Number of compositions of n into distinct parts with exactly three descents.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =32a(6) =35a(7) =63a(8) =93a(9) =148a(10) =205a(11) =589a(12) =674a(13) =1111a(14) =1551a(15) =2344a(16) =3140a(17) =4616a(18) =8210a(19) =10370a(20) =14976a(21) =20564a(22) =28598a(23) =38244a(24) =52451a(25) =68597a(26) =105527a(27) =131194a(28) =180087a(29) =234267