(Terms in A029613)/2.

Terms

a(0) =12a(1) =24a(2) =40a(3) =98a(4) =154a(5) =138a(6) =252a(7) =60a(8) =390a(9) =567a(10) =957a(11) =84a(12) =319a(13) =825a(14) =2112a(15) =403a(16) =1144a(17) =112a(18) =1547a(19) =6006a(20) =144a(21) =740a(22) =2660a(23) =7098a(24) =14560a(25) =23452a(26) =30030a(27) =884a(28) =3400a(29) =9758