id:A060560 - OEIS Search Results

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

+0
1

0, 1, 30, 498, 4435, 25395, 107331, 365260, 1058058, 2707245, 6278140, 13442286, 26942565, 51084943, 92383305, 160386360, 268718116, 436365945, 689252778, 1062132490, 1600850055, 2365010571, 3431103775, 4896133188, 6881801550 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`(n^8+4n^5+5n^4+2n^2+4n)/16.`
	CROSSREFS	`Sequence in context: A036223 A022658 A090957 this_sequence A118681 A020926 A022754` `Adjacent sequences: A060557 A060558 A060559 this_sequence A060561 A060562 A060563`
	KEYWORD	`nonn`
	AUTHOR	`njas, Apr 12 2001`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

AT&T Labs Research