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

A378571

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =56a(6) =190a(7) =670a(8) =2452a(9) =9139a(10) =34512a(11) =131960a(12) =510376a(13) =1992650a(14) =7840845a(15) =31063216a(16) =123809267a(17) =496117444a(18) =1997461096a(19) =8076398383a(20) =32780982554a(21) =133516673419a(22) =545535083011

External references