A096202 - OEIS

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A096202

Number of coverings of {1...n} by translation of a single set.

1, 2, 3, 6, 11, 22, 45, 92, 188, 382, 791, 1632, 3357 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	EXAMPLE	`a(5)=11 because the following are the 11 coverings of {1...5}, each one of which only uses a single set and its translations:` `{{1},{2},{3},{4},{5}}` `{{1,2},{3,4},{4,5}}` `{{1,2},{2,3},{3,4},{4,5}}` `{{1,2},{2,3},{4,5}}` `{{1,3},{2,4},{3,5}}` `{{1,2,3},{2,3,4},{3,4,5}}` `{{1,2,3},{3,4,5}}` `{{1,2,4},{2,3,5}}` `{{1,3,4},{2,4,5}}` `{{1,2,3,4},{2,3,4,5}}` `{{1,2,3,4,5}}`
	CROSSREFS	`Cf. A096154, A096203.` `Sequence in context: A192652 A132831 A007477 * A036653 A123769 A093304` `Adjacent sequences: A096199 A096200 A096201 * A096203 A096204 A096205`
	KEYWORD	`nonn`
	AUTHOR	`Jon Wild (wild(AT)music.mcgill.ca), Jul 27 2004`

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Last modified February 15 06:58 EST 2012. Contains 205694 sequences.