0,3

G.f.: A(x) = 1 + x*B(x)^6 where B(x) is the g.f. of A137969.

(PARI) {a(n)=local(A=1+x*O(x^n)); for(i=0, n, A=1+x*(1+x*A^3)^6); polcoeff(A, n)}

Cf. A137969, A137971; A137968, A137972, A137974.

Sequence in context: A012522 A012326 A112903 this_sequence A024079 A118094 A121376

Adjacent sequences: A137967 A137968 A137969 this_sequence A137971 A137972 A137973

nonn

Paul D. Hanna (pauldhanna(AT)juno.com), Feb 26 2008