Number of connected regular graphs with n nodes.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =5a(7) =4a(8) =17a(9) =22a(10) =167a(11) =539a(12) =18979a(13) =389436a(14) =50314796a(15) =2942198440