a(n) = Sum_{0<=m<n} Product_{-m<=j<=m} (n-j).

A279127

a(n) = Sum_{0<=m<n} Product_{-m<=j<=m} (n-j).

Terms

    a(0) =0a(1) =1a(2) =8a(3) =147a(4) =5824a(5) =405845a(6) =43733976a(7) =6726601063

External references