Triangle T(n,k), 0 <= k <= n, defined by T(n,k) = 2^k*A001497(n,k).

Terms

a(0) =1a(1) =2a(2) =2a(3) =12a(4) =12a(5) =4a(6) =120a(7) =120a(8) =48a(9) =8a(10) =1680a(11) =1680a(12) =720a(13) =160a(14) =16a(15) =30240a(16) =30240a(17) =13440a(18) =3360a(19) =480a(20) =32a(21) =665280a(22) =665280a(23) =302400a(24) =80640a(25) =13440a(26) =1344a(27) =64a(28) =17297280a(29) =17297280