G.f. A(x) satisfies A(x) = 1 + Sum_{n>=1} A(x)^n * 2*x^n/(1 - 2*x^(2*n)).
A192403
G.f. A(x) satisfies A(x) = 1 + Sum_{n>=1} A(x)^n * 2*x^n/(1 - 2*x^(2*n)).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =26a(4) =106a(5) =474a(6) =2210a(7) =10638a(8) =52578a(9) =265286a(10) =1360702a(11) =7074030a(12) =37191694a(13) =197398394a(14) =1056255758a(15) =5691813546a(16) =30860701490a(17) =168236407482a(18) =921576598970
External references
- oeis: A192403