Duplicate of A066966.

Terms

a(0) =0a(1) =2a(2) =2a(3) =10a(4) =12a(5) =30a(6) =40a(7) =82a(8) =110a(9) =190a(10) =260a(11) =422a(12) =570a(13) =860a(14) =1160a(15) =1690a(16) =2252a(17) =3170a(18) =4190