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A126733
Number of connected graphs on n nodes with edge chromatic number 3.
0
0, 0, 1, 4, 8, 26, 58, 185, 500, 1677
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OFFSET
1,4
LINKS
Table of n, a(n) for n=1..10.
Keith M. Briggs,
Combinatorial Graph Theory
CROSSREFS
A diagonal of triangle in
A126732
.
Sequence in context:
A262042
A227644
A074188
*
A297695
A333894
A218079
Adjacent sequences:
A126730
A126731
A126732
*
A126734
A126735
A126736
KEYWORD
nonn
AUTHOR
N. J. A. Sloane
, Feb 16 2007
STATUS
approved
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Last modified August 26 02:04 EDT 2024. Contains 375454 sequences. (Running on oeis4.)