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A207412 Number of connected triangle-free graphs on n nodes with edge chromatic number 6. 0
0, 0, 0, 0, 0, 0, 1, 6, 57, 659, 10236, 204927, 5231080, 166394885, 6459372691 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Table of n, a(n) for n=1..15.

CROSSREFS

Cf. A207410, A207408.

Sequence in context: A138414 A130565 A124556 * A324447 A060435 A153851

Adjacent sequences:  A207409 A207410 A207411 * A207413 A207414 A207415

KEYWORD

nonn,more

AUTHOR

Michael Sollami, Feb 17 2012

STATUS

approved

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Last modified January 22 07:30 EST 2020. Contains 331139 sequences. (Running on oeis4.)