Triangle T(n,k) = A053120(n+2,k)-2*A053120(n+1,k)+A053120(n,k) read by rows, 0<=k<n.

Terms

a(0) =2a(1) =0a(2) =6a(3) =-2a(4) =2a(5) =16a(6) =0a(7) =-10a(8) =10a(9) =40a(10) =2a(11) =-2a(12) =-36a(13) =36a(14) =96a(15) =0a(16) =14a(17) =-14a(18) =-112a(19) =112a(20) =224a(21) =-2a(22) =2a(23) =64a(24) =-64a(25) =-320a(26) =320a(27) =512a(28) =0a(29) =-18