id:A141607 - OEIS Search Results

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Nonprimes of the form n-(p(n+1)-p(n-2))/(p(n)-p(n-1)), where p(n)=n-th prime.

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0, 1, 4, 6, 8, 9, 10, 12, 15, 20, 21, 22, 24, 25, 26, 27, 33, 35, 36, 44, 45, 48, 50, 51, 57, 60, 62, 63, 68, 69, 72, 74, 75, 82, 84, 85, 90, 93, 98, 105, 110, 111, 115, 121, 122, 126, 129, 134, 135, 136, 138, 142, 143, 144, 145, 147, 148, 158, 165, 166, 169, 170, 172, 174, 176 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Entries are not repeated and shown in natural order.`
	EXAMPLE	`n=4: 4-(11-3)/(7-5)=0=a(1).` `n=6: 6-(17-7)/(13-11)=1=a(2).` `n=9: 9-(29-17)/(23-19)=6=a(4).` `n=10: 10-(31-19)/(29-23)=8=a(5).` `n=11: 11-(37-23)/(31-29)=4=a(3).`
	CROSSREFS	`Cf. A000040.` `Sequence in context: A109289 A066071 A067013 this_sequence A071070 A047820 A034878` `Adjacent sequences: A141604 A141605 A141606 this_sequence A141608 A141609 A141610`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Sep 10 2008`
	EXTENSIONS	`Corrected and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2008`

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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.

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