a(n) = A000094(n+4) - A006918(n).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =2a(7) =5a(8) =10a(9) =18a(10) =30a(11) =49a(12) =75a(13) =112a(14) =163a(15) =231a(16) =322a(17) =441a(18) =595a(19) =792a(20) =1045a(21) =1361a(22) =1760a(23) =2255a(24) =2871a(25) =3626a(26) =4559a(27) =5691a(28) =7077a(29) =8750