Number of graphs on n nodes with 3 cliques.

Terms

a(0) =0a(1) =0a(2) =1a(3) =4a(4) =12a(5) =31a(6) =67a(7) =132a(8) =239a(9) =407a(10) =657a(11) =1019a(12) =1523a(13) =2211a(14) =3126a(15) =4323a(16) =5859a(17) =7806a(18) =10236a(19) =13239a(20) =16906a(21) =21346a(22) =26670a(23) =33010a(24) =40498a(25) =49290a(26) =59543a(27) =71438a(28) =85158a(29) =100913