Binomial transform of A084136.

Terms

a(0) =1a(1) =2a(2) =8a(3) =32a(4) =144a(5) =672a(6) =3200a(7) =15360a(8) =73984a(9) =356864a(10) =1722368a(11) =8314880a(12) =40144896a(13) =193830912a(14) =935886848a(15) =4518838272a(16) =21818834944a(17) =105350561792a(18) =508677324800