A129424 Number of isomorphism classes of 7-regular loopless multigraphs of order 2n.

1, 8, 271, 90913, 165134083, 861889423083, 10352781874872853, 253226977418079364874, 11542716741789258789499297, 915461016322959135074642849828

Offset: 1

Author

Brendan McKay, Apr 15 2007

Keywords

• nonn
• more

Comments

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

Crossrefs

Column k=7 of A333330.

Cf. A129423, A129435, A129416, A129418, A129420, A129422, A129426.

Formula

Euler transform of A129423. - Andrew Howroyd, Mar 21 2020

Extensions

a(7)-a(10) from Andrew Howroyd, Mar 21 2020