Triangle T(n, k) = n!*binomial(n, k) - n! + 1, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =13a(8) =13a(9) =1a(10) =1a(11) =73a(12) =121a(13) =73a(14) =1a(15) =1a(16) =481a(17) =1081a(18) =1081a(19) =481a(20) =1a(21) =1a(22) =3601a(23) =10081a(24) =13681a(25) =10081a(26) =3601a(27) =1a(28) =1a(29) =30241