G.f.: Sum_{n>=0} binomial(4*n+2, n)/(2*n+1) * x^(n+1)/(1+x)^(2*n+1).
A317135
G.f.: Sum_{n>=0} binomial(4*n+2, n)/(2*n+1) * x^(n+1)/(1+x)^(2*n+1).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =18a(4) =92a(5) =504a(6) =2897a(7) =17235a(8) =105233a(9) =655687a(10) =4152461a(11) =26650675a(12) =172961053a(13) =1133152365a(14) =7484233381a(15) =49780558057a(16) =333155274455
External references
- oeis: A317135