a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)*x^k*(1 + (n - 3)*x^k)/(k*(1 - x^k)^4)).

A318125

a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)*x^k*(1 + (n - 3)*x^k)/(k*(1 - x^k)^4)).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =14a(4) =54a(5) =238a(6) =1026a(7) =4573a(8) =20404a(9) =91902a(10) =415953a(11) =1891908a(12) =8638846a(13) =39569655a(14) =181766878a(15) =836950153a(16) =3861927937a(17) =17853107055a(18) =82668539290a(19) =383360628369

External references