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A128237 Number of n-node (unlabeled) graphs with girth 4. +0
2
0, 1, 3, 15, 60, 297, 1618, 11359 (list; graph; listen)
OFFSET

3,3
CROSSREFS

Cf. A128041, A128042, A128236-A128243.

Sequence in context: A058748 A049314 A001655 this_sequence A058749 A072336 A122671

Adjacent sequences: A128234 A128235 A128236 this_sequence A128238 A128239 A128240

KEYWORD

nonn

AUTHOR

Keith M. Briggs, May 05 2007

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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