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A077027 Number of simple integral graphs on n nodes. 0
0, 2, 3, 6, 10, 20, 33, 71, 121 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Generated at the suggestion of Ed Pegg Jr. (ed(AT)mathpuzzle.com)

LINKS

Eric Weisstein's World of Mathematics, Integral Graph

CROSSREFS

Cf. A064731.

Sequence in context: A113292 A050291 A135452 * A030436 A030227 A180272

Adjacent sequences:  A077024 A077025 A077026 * A077028 A077029 A077030

KEYWORD

nonn,more

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), Oct 18, 2002

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Last modified February 16 14:37 EST 2012. Contains 205930 sequences.