G.f. A(x) satisfies Sum_{n=-oo..+oo} (x^n - 3*A(x))^n = 1 - Sum_{n>=1} x^(n^2).
A370033
G.f. A(x) satisfies Sum_{n=-oo..+oo} (x^n - 3*A(x))^n = 1 - Sum_{n>=1} x^(n^2).
Terms
- a(0) =1a(1) =3a(2) =8a(3) =19a(4) =46a(5) =161a(6) =799a(7) =4021a(8) =17932a(9) =71311a(10) =268639a(11) =1045731a(12) =4464576a(13) =20500010a(14) =95221503a(15) =429913365a(16) =1879365529a(17) =8112744634a(18) =35452835755a(19) =158833086233a(20) =725458442577
External references
- oeis: A370033