Triangle T(n,k) = (-1)^(k+n)*A054655(n,n-k), 0<=k<n, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =6a(4) =5a(5) =1a(6) =60a(7) =47a(8) =12a(9) =1a(10) =840a(11) =638a(12) =179a(13) =22a(14) =1a(15) =15120a(16) =11274a(17) =3325a(18) =485a(19) =35a(20) =1a(21) =332640a(22) =245004a(23) =74524a(24) =11985a(25) =1075a(26) =51a(27) =1a(28) =8648640a(29) =6314664