id:A050705 - OEIS Search Results

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Composite number such that when sum of its prime factors is added or subtracted becomes prime.

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10, 12, 14, 15, 20, 21, 26, 33, 35, 38, 44, 48, 51, 65, 68, 86, 93, 96, 111, 112, 116, 123, 161, 188, 201, 203, 206, 209, 210, 215, 221, 278, 297, 300, 304, 306, 321, 352, 356, 371, 384, 395, 398, 413, 420, 441, 471, 485, 524, 533, 543, 545, 546, 551, 570, 626 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`E.g. 545 = 5.109 so 545 +/- (5+109) = 545 +/- 114 = 659 and 431 and both are primes.`
	CROSSREFS	`Cf. A050703-A050710.` `Sequence in context: A116023 A062408 A127653 this_sequence A095406 A050769 A088381` `Adjacent sequences: A050702 A050703 A050704 this_sequence A050706 A050707 A050708`
	KEYWORD	`nonn,nice`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.`

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.

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