a(n) = Sum_{k=0..n} 4^k * binomial(n,k) * binomial(n+2,k).
A388205
a(n) = Sum_{k=0..n} 4^k * binomial(n,k) * binomial(n+2,k).
Terms
- a(0) =1a(1) =13a(2) =129a(3) =1181a(4) =10497a(5) =92205a(6) =806145a(7) =7037245a(8) =61426689a(9) =536511053a(10) =4690383233a(11) =41049250269a(12) =359654896897
External references
- oeis: A388205