A129426 Number of isomorphism classes of 8-regular loopless multigraphs of order n.

0, 1, 1, 10, 37, 582, 12511, 543779, 35255015, 3230979297, 397550237967, 63834143947661, 13080849749829233, 3358751856150607392, 1063851391062768324862, 410060430118305494628648, 190065946515113295597969794, 104826174445642584491349328181

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=8 of A333330.

Cf. A129425, A129437, A129416, A129418, A129420, A129422, A129424.

Formula

Euler transform of A129425. - Andrew Howroyd, Mar 17 2020

Extensions

a(1)=0 prepended and a(12)-a(18) from Andrew Howroyd, Mar 17 2020