id:A141608 - OEIS Search Results

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

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0, 4, 8, 9, 10, 14, 16, 18, 20, 21, 24, 25, 26, 30, 32, 34, 35, 36, 42, 44, 49, 50, 52, 56, 58, 60, 62, 68, 70, 74, 78, 81, 82, 84, 88, 92, 102, 104, 108, 110, 112, 114, 120, 121, 125, 128, 130, 133, 134, 135, 136, 141, 142, 143, 144, 146, 147, 162, 164, 165, 168, 169, 171, 175 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Entries are not repeated and shown in natural order.`
	EXAMPLE	`n=3: 3-(11-3)/(7-5)=-1 negative, discarded.` `n=5: 5-(17-7)/(13-11)=0=a(1).` `n=6: 6-(19-11)/(17-13)=4=a(2).` `n=11: 11-(41-29)/(37-31)=9=a(4).` `n=12: 12-(43-31)/(41-37)=9=a(4).` `n=13: 13-(47-37)/(43-41)=8=a(3).`
	CROSSREFS	`Cf. A000040, A141468.` `Sequence in context: A080970 A125493 A164923 this_sequence A094906 A078542 A124982` `Adjacent sequences: A141605 A141606 A141607 this_sequence A141609 A141610 A141611`
	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 8 08:31 EST 2009. Contains 170430 sequences.

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