> #THE NUMBER OF ATTENDANCE QUESTIONS WERE: 7
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> 
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> #Q1
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> #Who invented Latin squares and Latin-Greco squares? What are they?
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> 
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> #Leonhard Euler
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> #In combinatorics and in experimental design, a Latin square is an n ¡Á n array filled with n different symbols, each occurring exactly #once in each row and exactly once in each column. An example of a 3¡Á3 Latin square is
> 
> #A	B	C
> #C	A	B
> #B	C	A
> #The name "Latin square" was inspired by mathematical papers by Leonhard Euler (1707¨C1783), who used Latin characters as symbols,[1] but #any set of symbols can be used: in the above example, the alphabetic sequence A, B, C can be replaced by the integer sequence 1, 2, 3. #Euler began the general theory of Latin squares.
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> 
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> #Q2
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> #What is nops(AllGraphs(20))? 
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> #2^190
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> 
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> #Q3
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> #What is CC(G,38)? 
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> 
> #{1}
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> 
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> #Q4
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> #Is [1,1,4,38,728] in the OEIS? What is its A-number?

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> 
> #Yes, THE A number is A001187
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> 
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> #Q5
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> 
> #Given graph G=[{4,8}, {7}, {5,9}, {1,6}, {3,7,10}, {4,9}, {2,5}, {1}, {3,6}, {5}] Draw G.
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> 
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> #8-1-4-6-9-3-5-10-7-2
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> 
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> #Q6
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> #Is this sequence in the OEIS? What's its A number?
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> 
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> #A272: Number of trees on n labeled nodes: n^(n-2) with a(0)=1.
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> 
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> #Q7
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> #Is this sequence in the OEIS? What's its A number?
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> 
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> #A57500: Number of connected labeled graphs with n edges and n nodes.
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