(Terms in A014476)/2.

Terms

a(0) =2a(1) =5a(2) =3a(3) =28a(4) =14a(5) =4a(6) =63a(7) =42a(8) =18a(9) =105a(10) =60a(11) =5a(12) =231a(13) =165a(14) =396a(15) =110a(16) =33a(17) =6a(18) =858a(19) =143a(20) =39a(21) =1001a(22) =182a(23) =7a(24) =5720a(25) =4004a(26) =2184a(27) =910a(28) =280a(29) =60