a(n+2) = 6*a(n+1) + (-11 + n)*a(n) + (6 - 2*n)*a(n-1) for n >= 1.

A130019

a(n+2) = 6*a(n+1) + (-11 + n)*a(n) + (6 - 2*n)*a(n-1) for n >= 1.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =6a(4) =27a(5) =114a(6) =483a(7) =2106a(8) =9537a(9) =44934a(10) =219933a(11) =1115286a(12) =5842707a(13) =31537314a(14) =174991443a(15) =996169146a(16) =5808168297a(17) =34633891734a(18) =210943794093

External references