OFFSET
0,3
COMMENTS
A magma with element set X is right involutory if (xy)y = x for x,y in X.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..30
FORMULA
a(n) = A000085(n)^n.
MAPLE
b:= proc(n) b(n):= `if`(n<2, 1, b(n-1)+(n-1)*b(n-2)) end:
a:= n-> b(n)^n:
seq(a(n), n=0..15); # Alois P. Heinz, Apr 30 2023
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Apr 17 2023
STATUS
approved