Number of compositions of n having smallest part equal to 2.

Terms

a(0) =0a(1) =1a(2) =0a(3) =1a(4) =2a(5) =3a(6) =5a(7) =9a(8) =15a(9) =25a(10) =42a(11) =70a(12) =116a(13) =192a(14) =317a(15) =522a(16) =858a(17) =1408a(18) =2307a(19) =3775a(20) =6170a(21) =10074a(22) =16433a(23) =26784a(24) =43623a(25) =71002a(26) =115497a(27) =187777a(28) =305147a(29) =495669