id:A103297 - OEIS Search Results

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Number of different lengths that perfect rulers with n segments can have.

+0
4

1, 1, 2, 3, 3, 4, 4, 6, 6, 7, 7, 7, 8, 10, 11, 11, 11, 11, 11, 15 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`For definitions, references and links related to complete rulers see A103294.`
	LINKS	`Index entries for sequences related to perfect rulers.`
	FORMULA	`a(n) = A004137(n+1) - A004137(n) for n>= 1.`
	EXAMPLE	`a(5)=4 because a perfect ruler with 5 segments may have the length 10, 11, 12 or 13.`
	CROSSREFS	`Cf. A103298.` `Adjacent sequences: A103294 A103295 A103296 this_sequence A103298 A103299 A103300` `Sequence in context: A130120 A127434 A105677 this_sequence A095916 A130121 A007898`
	KEYWORD	`nonn,hard`
	AUTHOR	`Peter Luschny (peter(AT)luschny.de) Feb 28 2005`

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Last modified October 16 00:31 EDT 2008. Contains 145098 sequences.