Number of compositions of n into parts {3,4,5} when all parts 3,4 and 5 are present.

Terms

a(0) =6a(1) =0a(2) =0a(3) =12a(4) =12a(5) =12a(6) =20a(7) =30a(8) =50a(9) =60a(10) =80a(11) =120a(12) =162a(13) =225a(14) =305a(15) =401a(16) =560a(17) =763a(18) =1017a(19) =1365a(20) =1834a(21) =2484a(22) =3328a(23) =4420a(24) =5936a(25) =7943a(26) =10593a(27) =14148a(28) =18828a(29) =25092