a(n) = Sum_{k=0..n} binomial(n,k) * binomial(4*k,k).
A359643
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(4*k,k).
Terms
- a(0) =1a(1) =5a(2) =37a(3) =317a(4) =2885a(5) =27105a(6) =259765a(7) =2523813a(8) =24768069a(9) =244941833a(10) =2437083697a(11) =24367722725a(12) =244639635749
External references
- oeis: A359643