Triangle read by rows: T(n,k) = n!*Pell(n-k+1)/k!, where Pell(n)=A000129(n).

Terms

a(0) =1a(1) =2a(2) =1a(3) =10a(4) =4a(5) =1a(6) =72a(7) =30a(8) =6a(9) =1a(10) =696a(11) =288a(12) =60a(13) =8a(14) =1a(15) =8400a(16) =3480a(17) =720a(18) =100a(19) =10a(20) =1a(21) =121680a(22) =50400a(23) =10440a(24) =1440a(25) =150a(26) =12a(27) =1a(28) =2056320a(29) =851760