Triangle T(n, k) = 2 + n! - k! - (n-k)!, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =5a(8) =5a(9) =1a(10) =1a(11) =19a(12) =22a(13) =19a(14) =1a(15) =1a(16) =97a(17) =114a(18) =114a(19) =97a(20) =1a(21) =1a(22) =601a(23) =696a(24) =710a(25) =696a(26) =601a(27) =1a(28) =1a(29) =4321