A007163 - OEIS

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A007163

P-graphs with vertical symmetry.
(Formerly M2854)

1, 3, 10, 39, 158, 674, 2944, 13191, 92154, 523706 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	REFERENCES	`R. C. Read, On the enumeration of a class of plane multigraphs, Aequat. Math., 31 (1986), 47-63.` `N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).`
	CROSSREFS	`Sequence in context: A151065 A151066 A151067 * A050385 A123768 A005750` `Adjacent sequences: A007160 A007161 A007162 * A007164 A007165 A007166`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 14 23:16 EST 2012. Contains 205687 sequences.