Triangle, read by rows, where g.f.: A(x,y) = exp( Sum_{n>=1} (3^n + y)^n * x^n/n ) is a power series in x and y with integer coefficients.

A155812

Triangle, read by rows, where g.f.: A(x,y) = exp( Sum_{n>=1} (3^n + y)^n * x^n/n ) is a power series in x and y with integer coefficients.

Terms

    a(0) =1a(1) =3a(2) =1a(3) =45a(4) =12a(5) =1a(6) =6687a(7) =801a(8) =39a(9) =1a(10) =10782369a(11) =540720a(12) =10764a(13) =120a(14) =1a(15) =169490304819a(16) =3499254081a(17) =29275956a(18) =129348a(19) =363a(20) =1a(23) =709664882337a(24) =1321144632a(25) =1459773a(26) =1092a(27) =1

External references