id:A081001 - OEIS Search Results

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n is in the sequence if and only if it does not rank among the top n positive integers in centrality (cf. A080997 for fuller explanation of this concept).

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4

5, 7, 9, 11, 13, 17, 19, 22, 23, 25, 26, 29, 31, 33, 34, 35, 37, 38, 39, 41, 43, 46, 47, 49, 51, 53, 55, 57, 58, 59, 61, 62, 65, 67, 69, 71, 73, 74, 77, 79, 81, 82, 83, 85, 86, 87, 89, 91, 92, 93, 94, 95, 97, 101, 103, 106, 107, 109, 111, 113, 115, 116, 118, 119 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Complement of A081000.`
	FORMULA	`Formula for the centrality of n: A018804(n)/n^2 (see also A080997).`
	CROSSREFS	`Cf. A080997, A080998, also A081028 for centrality ranks of primes (all of which are members of this sequence except 2 and 3).` `Adjacent sequences: A080998 A080999 A081000 this_sequence A081002 A081003 A081004` `Sequence in context: A035034 A065155 A088502 this_sequence A075025 A075394 A124112`
	KEYWORD	`nonn`
	AUTHOR	`Matthew Vandermast (ghodges14(AT)comcast.net), Mar 02 2003`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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