Number of compositions of n with unique smallest part.

Terms

a(0) =1a(1) =1a(2) =3a(3) =3a(4) =8a(5) =11a(6) =20a(7) =34a(8) =59a(9) =96a(10) =167a(11) =282a(12) =475a(13) =800a(14) =1352a(15) =2275a(16) =3828a(17) =6426a(18) =10785a(19) =18085a(20) =30297a(21) =50698a(22) =84770a(23) =141623a(24) =236425a(25) =394381a(26) =657380a(27) =1094975a(28) =1822628a(29) =3031843