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A008323 Number of simple connected regular bipartite graphs with 2n nodes. 3
1, 1, 1, 2, 3, 5, 12, 34, 218, 4278, 431165, 162267174, 201636689352, 777816803938932, 9865957936943859185, 395886667549681686369527, 53716176608076643470380213991, 23524515269630339982914608683548933, 35682168849414944013547274439525153167248 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
Brendan McKay and E. Rogoyski, Latin squares of order ten, Electron. J. Combinatorics, 2 (1995) #N3.
CROSSREFS
For n > 1, these are the row sums of triangle A008326.
Sequence in context: A228905 A369847 A306038 * A000997 A266541 A301929
KEYWORD
nonn,hard,nice
AUTHOR
EXTENSIONS
a(10) corrected and a(11) added by Brendan McKay, Sep 06 2018
a(0)=1 prepended and terms a(12) and beyond from Andrew Howroyd, Apr 03 2020
STATUS
approved

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Last modified June 17 03:50 EDT 2024. Contains 373432 sequences. (Running on oeis4.)