Triangle read by rows: T(n,0) = T(n,n) = 1 for n >= 0, T(n,k) = ((n - 1)! + 1)*binomial(n, k) for 1 <= k <= n - 1, n >= 2.

A168621

Triangle read by rows: T(n,0) = T(n,n) = 1 for n >= 0, T(n,k) = ((n - 1)! + 1)*binomial(n, k) for 1 <= k <= n - 1, n >= 2.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =9a(8) =9a(9) =1a(10) =1a(11) =28a(12) =42a(13) =28a(14) =1a(15) =1a(16) =125a(17) =250a(18) =250a(19) =125a(20) =1a(21) =1a(22) =726a(23) =1815a(24) =2420a(25) =1815a(26) =726a(27) =1a(28) =1a(29) =5047

External references