Number of integer compositions of n whose leaders of weakly decreasing runs are distinct.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =15a(6) =29a(7) =55a(8) =105a(9) =198a(10) =371a(11) =690a(12) =1280a(13) =2364a(14) =4353a(15) =7981a(16) =14568a(17) =26466a(18) =47876a(19) =86264a(20) =154896a(21) =277236a(22) =494675a(23) =879924a(24) =1560275a(25) =2757830a(26) =4859010a(27) =8534420a(28) =14945107a(29) =26096824