a(n) = Sum_{k=0..n} binomial(n,k)*binomial(2*n,2*k).
A288470
a(n) = Sum_{k=0..n} binomial(n,k)*binomial(2*n,2*k).
Terms
- a(0) =1a(1) =2a(2) =14a(3) =92a(4) =646a(5) =4652a(6) =34124a(7) =253528a(8) =1901638a(9) =14368844a(10) =109208164a(11) =833981128a(12) =6394017436a(13) =49185717752a(14) =379438594136
External references
- oeis: A288470