Number of compositions of n with the smallest part in the first position.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =10a(5) =20a(6) =37a(7) =72a(8) =140a(9) =275a(10) =540a(11) =1069a(12) =2118a(13) =4206a(14) =8365a(15) =16659a(16) =33204a(17) =66231a(18) =132179a(19) =263913a(20) =527119a(21) =1053113a(22) =2104428a(23) =4205987a(24) =8407382a(25) =16807410a(26) =33603024a(27) =67187111a(28) =134343790a(29) =268638648