a(n) = n*(15*n^3 + 30*n^2 + 5*n - 2)*(n+4)!/5760.
A037962
a(n) = n*(15*n^3 + 30*n^2 + 5*n - 2)*(n+4)!/5760.
Terms
- a(0) =0a(1) =1a(2) =62a(3) =1806a(4) =40824a(5) =834120a(6) =16435440a(7) =322494480a(8) =6411968640a(9) =130456085760
External references
- oeis: A037962