A convolution triangle of numbers generalizing Pascal's triangle A007318.

Terms

a(0) =1a(1) =6a(2) =1a(3) =16a(4) =12a(5) =1a(6) =16a(7) =68a(8) =18a(9) =1a(10) =0a(11) =224a(12) =156a(13) =24a(14) =1a(15) =0a(16) =448a(17) =840a(18) =280a(19) =30a(20) =1a(21) =0a(22) =512a(23) =3072a(24) =2080a(25) =440a(26) =36a(27) =1a(28) =0a(29) =256