Number of compositions of n with exactly six descents.

Terms

a(0) =13a(1) =139a(2) =927a(3) =4719a(4) =20122a(5) =75317a(6) =254805a(7) =794475a(8) =2315005a(9) =6369689a(10) =16681342a(11) =41842970a(12) =101039601a(13) =235855414a(14) =534058830a(15) =1176497139a(16) =2527742988a(17) =5308195367a(18) =10915439320a(19) =22015220687a(20) =43612884462a(21) =84970442998a(22) =162994589899a(23) =308155639555a(24) =574716486444