id:A087106 - OEIS Search Results

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Primes of the form (prime(k-1)+1)*(prime(k+1)-1) + 1, k>1.

+0
2

13, 61, 97, 193, 397, 1597, 1933, 9001, 12097, 14821, 18217, 21001, 31321, 37633, 74521, 91141, 96097, 122497, 168037, 211597, 266221, 478801, 605221, 719041, 760321, 781453, 808081, 861121, 915769, 1034281, 1245421 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`k=25: (prime(25-1)+1)(prime(25+1)-1)=(89+1)(101-1)=9000, as 9000+1=A000040(1118), 9001 is a term.`
	CROSSREFS	`Cf. A087105.` `Sequence in context: A002647 A118711 A028874 this_sequence A142402 A140615 A086361` `Adjacent sequences: A087103 A087104 A087105 this_sequence A087107 A087108 A087109`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Aug 10 2003`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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