Number of compositions of n into distinct parts with exactly one descent.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =7a(5) =11a(6) =16a(7) =31a(8) =36a(9) =55a(10) =71a(11) =101a(12) =147a(13) =188a(14) =245a(15) =327a(16) =421a(17) =540a(18) =732a(19) =899a(20) =1154a(21) =1445a(22) =1831a(23) =2253a(24) =2846a(25) =3545a(26) =4352a(27) =5352a(28) =6576a(29) =7993