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A076434
Number of weakly regular simple graphs on n nodes.
3
0, 0, 0, 0, 0, 2, 4, 16, 21, 168
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
LINKS
Table of n, a(n) for n=1..10.
Eric Weisstein's World of Mathematics, Weakly Regular Graph
FORMULA
a(n) = A005176(n) - A076435(n). - Andrew Howroyd, Sep 03 2019
CROSSREFS
Cf. A005176 (regular simple graphs on n nodes).
Cf. A294405 (connected weakly regular graphs on n nodes).
Cf. A076435 (strongly regular simple graphs on n nodes).
Sequence in context: A045521 A338766 A242205 * A192150 A049441 A253143
Adjacent sequences: A076431 A076432 A076433 * A076435 A076436 A076437
KEYWORD
nonn,more,changed
AUTHOR
Eric W. Weisstein, Oct 11 2002
EXTENSIONS
a(10) from Eric W. Weisstein, Oct 30 2017
STATUS
approved

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Last modified February 20 11:46 EST 2025. Contains 381054 sequences.
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