A280763 Number of connected parity graphs on n nodes.

1, 1, 2, 6, 18, 75, 318, 1599, 8439, 48824, 300747, 2030086, 15425065, 141798617

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