Number of compositions of n into parts 1, 9, and 10.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =2a(10) =4a(11) =6a(12) =8a(13) =10a(14) =12a(15) =14a(16) =16a(17) =18a(18) =21a(19) =27a(20) =37a(21) =51a(22) =69a(23) =91a(24) =117a(25) =147a(26) =181a(27) =220a(28) =268a(29) =332