Secondary diagonal of A139755, the table of q-derangement numbers of type A.

A141754

Secondary diagonal of A139755, the table of q-derangement numbers of type A.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =16a(4) =54a(5) =190a(6) =684a(7) =2505a(8) =9291a(9) =34793a(10) =131277a(11) =498312a(12) =1900862a(13) =7280732a(14) =27983141a(15) =107868939a(16) =416869874a(17) =1614609446a(18) =6265869591a(19) =24358231651a(20) =94837442844a(21) =369755864507

External references