id:A081029 - OEIS Search Results

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Highly central numbers: numbers having a centrality higher than that of any larger number.

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1, 2, 3, 4, 6, 8, 12, 15, 18, 20, 24, 30, 36, 40, 42, 48, 60, 72, 84, 90, 120, 126, 144, 180, 210, 240 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A subset of A081000.`
	FORMULA	`Formula for centrality of n: A018804(n)/n^2 (cf. A080997 for fuller description of this concept).`
	CROSSREFS	`Cf. A080997, A080998 for centrality rankings of the positive integers.` `Sequence in context: A101902 A114312 A095041 this_sequence A034893 A018662 A048874` `Adjacent sequences: A081026 A081027 A081028 this_sequence A081030 A081031 A081032`
	KEYWORD	`nonn`
	AUTHOR	`Matthew Vandermast (ghodges14(AT)comcast.net), Mar 02 2003`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.