OFFSET
0,3
LINKS
Daniel Suteu, Table of n, a(n) for n = 0..50
FORMULA
EXAMPLE
For n = 4, a(4) = 240, which is the imaginary part of A000178(4)*(1/0! + i/1! - 1/2! - i/3! + 1/4!) = 156+240*i.
PROG
(PARI) a(n) = imag(prod(k=0, n, k!) * sum(k=0, n, I^k/k!));
CROSSREFS
KEYWORD
nonn
AUTHOR
Daniel Suteu, Feb 18 2017
STATUS
approved