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A128241 Number of n-node (unlabeled) connected graphs with girth 4. +0
1
0, 1, 2, 11, 42, 220, 1254, 9412 (list; graph; listen)
OFFSET

3,3
CROSSREFS

Cf. A128041, A128042, A128236-A128243.

Sequence in context: A089658 A140322 A027247 this_sequence A141190 A048500 A050620

Adjacent sequences: A128238 A128239 A128240 this_sequence A128242 A128243 A128244

KEYWORD

nonn

AUTHOR

Keith M. Briggs, May 05 2007

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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