OFFSET
0,2
COMMENTS
Conjectured to consist entirely of integers.
PROG
(PARI) {a(n)=if(n==0, 1, polcoeff(exp(sum(m=1, n, sum(k=0, ceil(log(m)/log(3)), (-1)^k*(floor(m/3^k)-floor((m-1)/3^k)))*(3*x)^m/m)+x*O(x^n)), n))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Mar 28 2010
STATUS
approved