id:A141863 - OEIS Search Results

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

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3, 2, 3, 7, 5, 2, 5, 11, 17, 7, 17, 59, 13, 17, 41, 23, 29, 61, 47, 199, 101, 71, 41, 23, 263, 269, 137, 139, 97, 59, 101, 103, 67, 173, 353, 127, 409, 139, 419, 449, 229, 163, 199, 103, 223, 229, 349, 181, 733, 751, 853, 883, 109, 197, 1033, 347, 521, 211, 137, 1109, 373 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`n=12: 12/(2(p(12-1)-p(12-2)))=12/(2(31-29))=3=a(1).` `n=16: 16/(2(p(16-1)-p(16-2)))=16/(2(47-43))=2=a(2).` `n=24: 24/(2(p(24-1)-p(24-2)))=24/(2(83-79))=3=a(3).` `n=28: 28/(2(p(28-1)-p(28-2)))=28/(2(103-101))=7=a(4).` `n=40: 40/(2(p(40-1)-p(40-2)))=40/(2(167-163))=5=a(5).`
	CROSSREFS	`Cf. A000040, A001223.` `Sequence in context: A084388 A136389 A001368 this_sequence A071010 A073341 A070982` `Adjacent sequences: A141860 A141861 A141862 this_sequence A141864 A141865 A141866`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Sep 15 2008`
	EXTENSIONS	`Corrected and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2008`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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