id:A086870 - OEIS Search Results

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Primes equal to a product of twin primes minus 1 divided by 2.

+0
2

7, 17, 71, 449, 881, 2591, 9521, 39761, 106721, 179999, 206081, 342791, 388961, 596231, 847601, 1292831, 2268449, 2571911, 2836961, 3612671, 6223391, 6329681, 6415361, 8520191, 8946449, 9409121, 10342151, 12550049, 16485281, 18800711 (list; graph; listen)

	OFFSET	`3,1`
	FORMULA	`Primes of the form (t1*t2-1)/2, where t1, t2 are twin primes.`
	EXAMPLE	`t1 = 71,t2 = 73, (71*73-1)/2 = 5182/2 = 2591 = prime.`
	CROSSREFS	`Sequence in context: A051809 A034054 A120876 this_sequence A107693 A122528 A123206` `Adjacent sequences: A086867 A086868 A086869 this_sequence A086871 A086872 A086873`
	KEYWORD	`easy,nonn`
	AUTHOR	`Cino Hilliard (hillcino368(AT)gmail.com), Aug 20 2003`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

AT&T Labs Research