Triangle T(n, k) = 1 + (k!)^2 - 2*k!*(n-k)! + ((n-k)!)^2, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =2a(6) =26a(7) =2a(8) =2a(9) =26a(10) =530a(11) =26a(12) =1a(13) =26a(14) =530a(15) =14162a(16) =530a(17) =17a(18) =17a(19) =530a(20) =14162a(21) =516962a(22) =14162a(23) =485a(24) =1a(25) =485a(26) =14162a(27) =516962a(28) =25391522a(29) =516962