a(n) = A004017(n)/2.

Terms

a(0) =8a(1) =64a(2) =224a(3) =512a(4) =1008a(5) =1792a(6) =2752a(7) =4096a(8) =6056a(9) =8064a(10) =10656a(11) =14336a(12) =17584a(13) =22016a(14) =28224a(15) =32768a(16) =39312a(17) =48448a(18) =54880a(19) =64512a(20) =77056a(21) =85248a(22) =97344a(23) =114688a(24) =126008a(25) =140672a(26) =163520a(27) =176128a(28) =195120a(29) =225792