#ATTENDANCE QUIZ FOR LECTURE 18 of Dr. Z.'s Math454(02) Rutgers University

# Please Edit this .txt page with Answers

#Email  ShaloshBEkhad@gmail.com 
#Subject: p18
#with an attachment called
#p18FirstLast.txt
#(e.g. p18DoronZeilberger.txt)

#Right after finishing watching the lecture but no later than Nov. 10, 2020, 8:00pm


THE NUMBER OF ATTENDANCE QUESTIONS WERE:

PLEASE LIST ALL THE QUESTIONS FOLLOWED, AFTER EACH, BY THE ANSWER
#Attendance Question 1
#Who invented Latin squares and Latin-Greco Squares, and what are they?
#A Latin square is an n × n array filled with n different symbols, each occurring exactly once in each row and exactly once in each column. An example of a 3×3 Latin square is. A. B. C.
#Invented by Leonhard Euler
#A Graeco-Latin square design is a design of experiment in which the experimental units are grouped in three different ways. If every Latin letter coincides exactly once with a Greek letter, the two Latin square designs are orthogonal. Together they form a Graeco-Latin square design.

#Attendance Question 2
#What is nops(AllGraphs(20));
#Attendance Answer
56378490493870098578490

#Attendance Question 3
#Is this sequence in OEIS? If it is what is its A-number?
#Attendance Answer
#A84285

#Attendance Question 4
#Draw this graph manually
#Attendance Answer
#8-1-4-6-9-3-5-7-2
             |
	    10
#Attendance question 5
#Is this sequence in the leis
#What is the number of trees with 20 vertices?
#Attendance Answer 
#A246527
#321608928954695680000000

#Attendance Question 6
#Is this sequence in OEIS
#Attendance Answer
#A61540