A129430 Number of isomorphism classes of connected 5-regular multigraphs of order 2n, loops allowed.

3, 26, 639, 40264, 5846105, 1620621150, 752480161278, 538934691750368, 562620407713724992, 820458681175954269942, 1616087981640640784235446, 4183688192689449962777539596, 13914233045360143936837907106395, 58319096569220501055727735345999221

Offset: 1

Author

Brendan McKay, Apr 15 2007

Keywords

• nonn

Comments

Initial terms computed using software at http://users.cecs.anu.edu.au/~bdm/nauty/

Crossrefs

Column k=5 of A333397.

Cf. A129431, A129419, A005967, A085549, A129432, A129434, A129436.

Formula

Inverse Euler transform of A129431. - Andrew Howroyd, Mar 19 2020

Extensions

a(8)-a(14) added by Andrew Howroyd, Mar 21 2020