Column 8 of triangle A055907.

Terms

a(0) =1a(1) =16a(2) =130a(3) =748a(4) =3459a(5) =13612a(6) =47141a(7) =147116a(8) =421040a(9) =1119827a(10) =2796446a(11) =6610818a(12) =14893276a(13) =32150509a(14) =66807075a(15) =134139807a(16) =261101457a(17) =494074770a(18) =911085320a(19) =1640685080a(20) =2890653798a(21) =4990940719a(22) =8456978339a(23) =14081784408a(24) =23068258050