Number of compositions of n in which the maximal multiplicity of parts equals 3.

Terms

a(0) =1a(1) =0a(2) =4a(3) =5a(4) =18a(5) =34a(6) =59a(7) =132a(8) =272a(9) =519a(10) =966a(11) =1746a(12) =3487a(13) =5986a(14) =10570a(15) =19701a(16) =34444a(17) =59250a(18) =101155a(19) =180588a(20) =302788a(21) =515205a(22) =841042a(23) =1449392a(24) =2420163a(25) =3959442a(26) =6472636a(27) =10656987a(28) =17332640a(29) =28234296