Number of graphs with n nodes and n-3 edges.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =5a(6) =10a(7) =24a(8) =63a(9) =165a(10) =467a(11) =1405a(12) =4435a(13) =14775a(14) =51814a(15) =190443a(16) =732472a(17) =2939612a(18) =12277230a(19) =53233295a(20) =239083372a(21) =1109921554a(22) =5316143531a(23) =26225625392a(24) =133050795412a(25) =693227353094