a(n) = Sum_{k=0..n} binomial(4*n+1,6*k).
A387876
a(n) = Sum_{k=0..n} binomial(4*n+1,6*k).
Terms
- a(0) =1a(1) =1a(2) =85a(3) =1730a(4) =18565a(5) =349525a(6) =5858126a(7) =87087001a(8) =1431655765a(9) =23100202490a(10) =364760483725
External references
- oeis: A387876