OFFSET
0,2
COMMENTS
The g.f. of A277041(n) = a(n)/(n+1) appears to have an interesting functional interpretation.
FORMULA
a(n) = (n+1)*A277041(n).
PROG
(PARI) { a(n) = local(m=n + ceil(log(n+3)/log(3)), B=sum(k=0, m, x^(3^k))); polcoeff((B+O(x^(3^m+n+1)))^(n+1), 3^m+n) }
for(n=0, 15, print1(a(n), ", "))
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Paul D. Hanna, Sep 25 2016
STATUS
approved