Duplicate of A063997.

Terms

a(0) =4a(1) =40a(2) =112a(3) =220a(4) =400a(5) =1012a(6) =1120a(7) =1300a(8) =2020a(9) =2200a(10) =3100a(11) =4000a(12) =10012a(13) =10120a(14) =10300