a(n) = Sum_{k=0..n} binomial(n,k)^2*binomial(2k,k+1).
A228514
a(n) = Sum_{k=0..n} binomial(n,k)^2*binomial(2k,k+1).
Terms
- a(0) =0a(1) =1a(2) =8a(3) =60a(4) =456a(5) =3535a(6) =27888a(7) =223209a(8) =1807760a(9) =14784759a(10) =121909800a(11) =1012208340a(12) =8454274920a(13) =70975888425a(14) =598536562848
External references
- oeis: A228514