id:A007717 - OEIS Search Results

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Number of symmetric polynomial functions of degree n of a symmetric matrix (of indefinitely large size) under joint row and column permutations. Also number of multigraphs with loops on infinite set of nodes having n edges.

+0
6

2, 7, 23, 79, 274, 1003, 3763, 14723, 59663, 250738, 1090608, 4905430, 22777420, 109040012, 537401702 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`Huaien Li and David C. Torney, Enumerations of Multigraphs, 2002.`
	CROSSREFS	`Cf. A050535, A002620, A050531, A050532.` `Sequence in context: A091702 A068593 A112657 this_sequence A130567 A143629 A119371` `Adjacent sequences: A007714 A007715 A007716 this_sequence A007718 A007719 A007720`
	KEYWORD	`easy,nonn`
	AUTHOR	`C. L. Mallows (colinm(AT)research.avayalabs.com)`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 26 2000`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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