a(n) = (3*n-1)*a(n-1) - a(n-2).

A121354

a(n) = (3*n-1)*a(n-1) - a(n-2).

Terms

    a(0) =0a(1) =1a(2) =5a(3) =39a(4) =424a(5) =5897a(6) =99825a(7) =1990603a(8) =45684044a(9) =1185794541a(10) =34342357645

External references