OFFSET
0,3
LINKS
Daniel Suteu, Table of n, a(n) for n = 0..19
Wikipedia, Sophomore's dream.
PROG
(PARI) sum(k=1, n, (-1)^(k-1)/k^k) * prod(k=1, n, k^k)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Daniel Suteu, Dec 03 2016
STATUS
approved