a(n) = 16^n * Sum_{k=0..n} binomial(2*k, k) / 16^k.
A167713
a(n) = 16^n * Sum_{k=0..n} binomial(2*k, k) / 16^k.
Terms
- a(0) =1a(1) =18a(2) =294a(3) =4724a(4) =75654a(5) =1210716a(6) =19372380a(7) =309961512a(8) =4959397062a(9) =79350401612
External references
- oeis: A167713