id:A074926 - OEIS Search Results

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Numbers n such that p(n)*p(n+1)+4 is a square.

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2, 11, 18, 40, 47, 51, 74, 76, 91, 96, 97, 105, 108, 164, 185, 203, 205, 208, 227, 238, 243, 252, 271, 291, 312, 321, 349, 351, 362, 374, 392, 396, 406, 420, 438, 449, 453, 523, 529, 541, 562, 576, 590, 602, 629, 639, 641, 668, 679, 698, 711, 720, 734, 752 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Primes of form pq+4 where p and q are consecutive primes are in A063442.`
	EXAMPLE	`p(11)p(12) + 4 = 3741+4 = 1151 -> prime.`
	CROSSREFS	`Cf. A063442.` `Sequence in context: A043461 A030551 A121848 this_sequence A066144 A102343 A023173` `Adjacent sequences: A074923 A074924 A074925 this_sequence A074927 A074928 A074929`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Oct 02 2002`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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