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A129424 Number of isomorphism classes of 7-regular loopless multigraphs of order 2n. 8
1, 8, 271, 90913, 165134083, 861889423083, 10352781874872853, 253226977418079364874, 11542716741789258789499297, 915461016322959135074642849828 (list; graph; refs; listen; history; text; internal format)
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..10.
FORMULA
Euler transform of A129423. - Andrew Howroyd, Mar 21 2020
CROSSREFS
Column k=7 of A333330.
Cf. A129423, A129435, A129416, A129418, A129420, A129422, A129426.
Sequence in context: A230590 A300047 A336214 * A274559 A338636 A335586
Adjacent sequences: A129421 A129422 A129423 * A129425 A129426 A129427
KEYWORD
nonn,more
AUTHOR
Brendan McKay, Apr 15 2007
EXTENSIONS
a(7)-a(10) from Andrew Howroyd, Mar 21 2020
STATUS
approved

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Last modified May 16 00:16 EDT 2024. Contains 372549 sequences. (Running on oeis4.)