a(n) = Sum_{k=0..n} binomial(4*k,k) / (3*k + 1).
A345367
a(n) = Sum_{k=0..n} binomial(4*k,k) / (3*k + 1).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =28a(4) =168a(5) =1137a(6) =8221a(7) =62041a(8) =482773a(9) =3845033a(10) =31188921a(11) =256757719a(12) =2139691083a(13) =18015030073a(14) =153008796673
External references
- oeis: A345367