Number of generalized fusenes with n heptagons.

Terms

a(0) =1a(1) =1a(2) =3a(3) =10a(4) =44a(5) =249a(6) =1513a(7) =10002a(8) =68455a(9) =482571a(10) =3470782a(11) =25391403a(12) =188353848a(13) =1414150643a(14) =10728851795a(15) =82151290333a(16) =634203702080