a(n) = S3(n,3), where S3(n, t) = Sum_{k=0..n} k^t *(Sum_{j=0..k} binomial(n,j))^3.
A089671
a(n) = S3(n,3), 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) =539a(3) =16632a(4) =364042a(5) =6510160a(6) =101817234a(7) =1447146512a(8) =19144522160a(9) =239513659776
External references
- oeis: A089671