Number of regular graphs with n unlabeled nodes.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =3a(6) =8a(7) =6a(8) =22a(9) =26a(10) =176a(11) =546a(12) =19002a(13) =389454a(14) =50314870a(15) =2942198546