#ATTENDANCE QUIZ FOR LECTURE 11 of Dr. Z.'s Math454(02) Rutgers University

# Please Edit this .txt page with Answers

#Email  ShaloshBEkhad@gmail.com 
#Subject: p11
#with an attachment called
#p11FirstLast.txt
#(e.g. p11DoronZeilberger.txt)

#Right after finishing watching the lecture but no later than Oct. 13, 2020, 8:00pm


THE NUMBER OF ATTENDANCE QUESTIONS WERE:3

#attendance question 1
#who was Dr.z's next door neighbor?
#what did he reply to Dr.z when asked "How many ways to break up russian Dolls?"

#Answer: Dr. Joel Spencer was Dr. z's neighbor in 1980 and he relied to the question as "This is sterling question"

#################################

#attendance question 2
#what is the A-number in the oeis of sequence [1,2,5,15,52,203,877,4140]?

#Answer: A000110

#################################

#attendance question 3
#Which of the Z(r) except for r=1 are in the OEIS?

#answer: 
Z := r -> local n, k; seq(add(Snk(n, k)^r, k = 1 .. n), n = 1 .. 20)

Z(2)
1, 2, 11, 87, 952, 13513, 237113, 5016728, 125121009, 3615047527, 119384499720, 4455637803543, 186152008588691, 8636436319397292, 441871067839416319, 24781002306869712365, 1515279889256750470086, 100546673139756241189021, 7209605987244352052104275, 556516294632874102717412282
#A047797

#z(3) ~ Z(6) doesn't have a OEIS seq.