a(n) = S3(n,1), where S3(n, t) = Sum_{k=0..n} k^t *(Sum_{j=0..k} binomial(n,j))^3.
A089669
a(n) = S3(n,1), where S3(n, t) = Sum_{k=0..n} k^t *(Sum_{j=0..k} binomial(n,j))^3.
Terms
- a(0) =0a(1) =8a(2) =155a(3) =2286a(4) =29296a(5) =344140a(6) =3807774a(7) =40327280a(8) =413058080a(9) =4120742808a(10) =40242188170a(11) =386141947972
External references
- oeis: A089669