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A280763 Number of connected parity graphs on n nodes. 1
1, 1, 2, 6, 18, 75, 318, 1599, 8439, 48824, 300747, 2030086, 15425065, 141798617 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..14.

F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 5c1d0e1

Jessica Shi, Enumeration of unlabeled graph classes: A study of tree decompositions and related approaches, 2015.

FORMULA

Inverse Euler transform of A123443.

CROSSREFS

Sequence in context: A213427 A006388 A007116 * A079391 A162058 A113844

Adjacent sequences:  A280760 A280761 A280762 * A280764 A280765 A280766

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jan 17 2017

EXTENSIONS

a(8)-a(14) added using tinygraph by Falk Hüffner, Jun 28 2018

STATUS

approved

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Last modified March 6 03:35 EST 2021. Contains 341841 sequences. (Running on oeis4.)