a(n) = S3(n,2), where S3(n, t) = Sum_{k=0..n} k^t *(Sum_{j=0..k} binomial(n,j))^3.
A089670
a(n) = S3(n,2), 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) =283a(3) =6044a(4) =101360a(5) =1470640a(6) =19361174a(7) =237684384a(8) =2768042208a(9) =30935313600a(10) =334481353690
External references
- oeis: A089670