id:A141650 - OEIS Search Results

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

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5, 7, 3, 13, 7, 11, 29, 17, 37, 7, 5, 53, 59, 67, 19, 13, 41, 83, 31, 107, 131, 19, 47, 71, 29, 157, 193, 41, 19, 241, 61, 251, 137, 47, 97, 311, 23, 331, 67, 397, 137, 211, 73, 149, 229, 157, 79, 41, 251, 503, 43, 173, 263, 269, 619, 311, 659, 691, 353, 739, 199, 421, 281, 853 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Entries may be repeated and are shown in order of increasing generator n.`
	EXAMPLE	`n=20: 20/(2(p(20+1)-p(20))=20/(2(73-71))=5=a(1).` `n=28: 28/(2(p(28+1)-p(28))=28/(2(109-107))=7=a(2).` `n=36: 36/(2(p(36+1)-p(36))=36/(2(157-151))=3=a(3).` `n=52: 52/(2(p(52+1)-p(52))=52/(2(241-239))=13=a(4).` `n=84: 84/(2(p(84+1)-p(84))=84/(2(439-433))=7=a(5).` `n=88: 88/(2(p(88+1)-p(88))=88/(2(461-457))=11=a(6).`
	CROSSREFS	`Cf. A000040.` `Sequence in context: A144543 A076567 A146535 this_sequence A058091 A109986 A021868` `Adjacent sequences: A141647 A141648 A141649 this_sequence A141651 A141652 A141653`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Sep 13 2008`
	EXTENSIONS	`Corrected and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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