First column of triangle A113463.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =8a(5) =23a(6) =24a(7) =103a(8) =304a(9) =324a(10) =8a(11) =1024a(12) =1024a(13) =5096a(14) =5096a(15) =37548a(16) =83520a(17) =171360a(18) =530424