(Terms in A029661)/2.

Terms

a(0) =2a(1) =7a(2) =3a(3) =10a(4) =25a(5) =4a(6) =91a(7) =56a(8) =22a(9) =5a(10) =147a(11) =78a(12) =27a(13) =336a(14) =225a(15) =105a(16) =6a(17) =561a(18) =330a(19) =1254a(20) =891a(21) =176a(22) =45a(23) =7a(24) =2145a(25) =221a(26) =52a(27) =4719a(28) =2002a(29) =273