Number of compositions of n such that the smallest part has multiplicity three.

Terms

a(0) =1a(1) =0a(2) =4a(3) =5a(4) =14a(5) =24a(6) =59a(7) =108a(8) =213a(9) =419a(10) =808a(11) =1522a(12) =2872a(13) =5366a(14) =9960a(15) =18362a(16) =33660a(17) =61364a(18) =111375a(19) =201273a(20) =362225a(21) =649413a(22) =1160289a(23) =2066355a(24) =3668840a(25) =6495542a(26) =11469453a(27) =20201295a(28) =35496670a(29) =62233609