a(n) = T(8,n), array T given by A048505.

Terms

a(0) =1a(1) =82a(2) =263a(3) =665a(4) =1553a(5) =3505a(6) =7777a(7) =17089a(8) =37313a(9) =81089a(10) =175553a(11) =378817a(12) =815041a(13) =1748929a(14) =3743681a(15) =7995329a(16) =17039297a(17) =36241345a(18) =76939201a(19) =163053505a(20) =344981441a(21) =728760257a(22) =1537212353a(23) =3238002625a(24) =6811549633a(25) =14310965185a(26) =30031216577a(27) =62948114369a(28) =131801808833