Number of compositions of 8*n into parts 1 and 8.

Terms

a(0) =1a(1) =2a(2) =11a(3) =64a(4) =345a(5) =1824a(6) =9661a(7) =51284a(8) =272333a(9) =1445995a(10) =7677250a(11) =40760798a(12) =216412235a(13) =1149004281a(14) =6100444144a(15) =32389272248a(16) =171965334801a(17) =913020717480