G.f. satisfies A(x) = exp( Sum_{k>=1} (A(x^k) + A(w*x^k) + A(w^2*x^k))/3 * x^k/k ), where w = exp(2*Pi*i/3).

A363404

G.f. satisfies A(x) = exp( Sum_{k>=1} (A(x^k) + A(w*x^k) + A(w^2*x^k))/3 * x^k/k ), where w = exp(2*Pi*i/3).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =2a(7) =4a(8) =5a(9) =5a(10) =10a(11) =12a(12) =13a(13) =26a(14) =34a(15) =36a(16) =73a(17) =96a(18) =104a(19) =210a(20) =288a(21) =315a(22) =638a(23) =881a(24) =974a(25) =1975a(26) =2777a(27) =3089a(28) =6276a(29) =8895

External references