a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+2*k,k).
A388533
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+2*k,k).
Terms
- a(0) =1a(1) =4a(2) =24a(3) =163a(4) =1168a(5) =8624a(6) =64911a(7) =495156a(8) =3814624a(9) =29610964a(10) =231238624a(11) =1814615136a(12) =14297530351a(13) =113034862828a(14) =896235865528
External references
- oeis: A388533