G.f. A(x) satisfies 1/x = Sum_{n=-oo..+oo} A(x)^n * (1 + A(x)^(2*n+1))^(n+1).
A378830
G.f. A(x) satisfies 1/x = Sum_{n=-oo..+oo} A(x)^n * (1 + A(x)^(2*n+1))^(n+1).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =42a(5) =153a(6) =610a(7) =2459a(8) =10252a(9) =43409a(10) =187057a(11) =816018a(12) =3600270a(13) =16030706a(14) =71959064a(15) =325263050a(16) =1479270802a(17) =6764056992a(18) =31078467690a(19) =143411844050a(20) =664352697921
External references
- oeis: A378830