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A054927 Number of connected unlabeled "median" graphs having n nodes such that complement is also connected. 0
1, 0, 0, 1, 4, 17, 122, 1512, 32692, 1332942, 105327842, 15931236010, 4514847754466, 2400986640234092, 2424697785383015323 (list; graph; refs; listen; history; internal format)
OFFSET

1,5

LINKS

V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.

FORMULA

A001437(n)+A054926(n)-A000717(n).

CROSSREFS

Sequence in context: A004140 A206353 A032115 * A071138 A032325 A032335

Adjacent sequences:  A054924 A054925 A054926 * A054928 A054929 A054930

KEYWORD

nonn,easy,more

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), May 24 2000

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Last modified February 14 07:16 EST 2012. Contains 205589 sequences.