Composite terms of A007755.

Terms

a(0) =2329a(1) =4369a(2) =10537a(3) =35209a(4) =281929a(5) =1114129a(6) =8978569a(7) =16843009a(8) =143163649a(9) =286331153a(10) =1086374209a(11) =4295098369a(12) =9198250129a(13) =18325194049a(14) =36507844609a(15) =73016672273a(16) =139055899009a(17) =277033877569a(18) =586397253889