A129436 Number of isomorphism classes of connected 8-regular multigraphs of order n, loops allowed.

1, 4, 17, 149, 1934, 44821, 1631629, 89057367, 6849428873, 713780361312, 97876276145119, 17259548258350637, 3840154740252625874, 1060662127742505706789, 358584059544008234423217, 146560585570176100774010071, 71630591614693085251230481320, 41456445821273701849195905028292

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..18.

Formula

Inverse Euler transform of A129437. - Andrew Howroyd, Mar 19 2020

Crossrefs

Column k=8 of A333397.

Cf. A129437, A129425, A005967, A085549, A129430, A129432, A129434.

Sequence in context: A041026 A072755 A320444 * A063857 A362646 A072654

Adjacent sequences: A129433 A129434 A129435 * A129437 A129438 A129439

Keyword

nonn

Author

Brendan McKay, Apr 15 2007

Extensions

a(11)-a(18) added by Andrew Howroyd, Mar 21 2020

Status

approved