Number of connected n-regular loopless multigraphs on eight unlabeled nodes.

A325474

Number of connected n-regular loopless multigraphs on eight unlabeled nodes.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =20a(4) =204a(5) =1689a(6) =13303a(7) =90614a(8) =543116a(9) =2842431a(10) =13218770a(11) =55233883a(12) =210199115a(13) =736166006a(14) =2395665563a(15) =7301022565a(16) =20981692199a(17) =57188601747a(18) =148588072319a(19) =369611918382a(20) =883579452509

External references