a(n) = T(8,n), array T given by A047858.

Terms

a(0) =1a(1) =10a(2) =29a(3) =69a(4) =153a(5) =329a(6) =697a(7) =1465a(8) =3065a(9) =6393a(10) =13305a(11) =27641a(12) =57337a(13) =118777a(14) =245753a(15) =507897a(16) =1048569a(17) =2162681a(18) =4456441a(19) =9175033a(20) =18874361a(21) =38797305a(22) =79691769a(23) =163577849a(24) =335544313a(25) =687865849a(26) =1409286137a(27) =2885681145a(28) =5905580025a(29) =12079595513