OFFSET
0,2
FORMULA
E.g.f.: exp( 3 * Sum_{k>=0} x^(3^k)/3^k ).
PROG
(PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(exp(3*sum(k=0, ceil(log(N+1)/log(3)), x^3^k/3^k))))
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Jul 05 2024
STATUS
approved