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

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =11a(7) =15a(8) =22a(9) =30a(10) =42a(11) =2091a(12) =2111a(13) =4169a(14) =6236a(15) =10344a(16) =14464a(17) =22663a(18) =30880a(19) =45215a(20) =61610a(21) =86165a(22) =114823a(23) =633991a(24) =681039a(25) =1224713a(26) =1780658a(27) =2839351a(28) =3916439a(29) =5986776