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A007131 Number of unlabeled connected strength 3 Eulerian graphs with n nodes.
(Formerly M1990)
2
0, 2, 10, 162, 6218, 739198, 292320730, 393805101318, 1834614855993394, 30008091277676005830, 1747116355298560745383906, 366330007995516101568779931526, 279347436837102450848968821962591698 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
REFERENCES
R. W. Robinson, personal communication.
R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1979.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
CROSSREFS
Sequence in context: A076659 A197313 A294352 * A126449 A328812 A126451
KEYWORD
nonn,nice
AUTHOR
STATUS
approved

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Last modified July 14 12:31 EDT 2024. Contains 374318 sequences. (Running on oeis4.)