G.f. A(x) satisfies: x = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x)^n.

A355351

G.f. A(x) satisfies: x = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x)^n.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =16a(4) =60a(5) =231a(6) =920a(7) =3819a(8) =16365a(9) =71792a(10) =320219a(11) =1446517a(12) =6602975a(13) =30415725a(14) =141231704a(15) =660431602a(16) =3107519738a(17) =14701758926a(18) =69891556656a(19) =333700223891

External references