id:A060532 - OEIS Search Results

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Number of ways to color vertices of a heptagon using <= n colors, allowing rotations and reflections.

+0
1

0, 1, 18, 198, 1300, 5895, 20646, 60028, 151848, 344925, 719290, 1399266, 2569788, 4496323, 7548750, 12229560, 19206736, 29351673, 43782498, 63913150, 91508580, 128746431, 178285558, 243341748, 327771000, 436160725, 573929226 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`(n^7+7n^4+6n)/14.`
	CROSSREFS	`Sequence in context: A125406 A042940 A034727 this_sequence A073397 A020920 A083812` `Adjacent sequences: A060529 A060530 A060531 this_sequence A060533 A060534 A060535`
	KEYWORD	`nonn`
	AUTHOR	`njas, Apr 12 2001`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research