id:A116661 - OEIS Search Results

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Integers in both sequences A114522 and A063989.

+0
2

4, 6, 8, 9, 10, 12, 18, 20, 22, 25, 27, 32, 34, 44, 48, 49, 50, 58, 68, 72, 80, 82, 108, 116, 118, 121, 125, 128, 142, 162, 164, 165, 169, 176, 192, 200, 202, 214, 236, 242, 243, 272, 273, 274, 284, 288, 289, 298, 320, 343, 345, 358, 361, 382, 385, 394, 399, 404 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`20 = 2^2 *5^1. Both the number of prime divisors (counted with multiplicity), 2+1 = 3, and the sum of the distinct prime divisors, 2+5 = 7, are primes. So 20 is in the sequence.`
	CROSSREFS	`Cf. A114522, A063989, A116660.` `Sequence in context: A071070 A047820 A034878 this_sequence A109104 A073303 A104211` `Adjacent sequences: A116658 A116659 A116660 this_sequence A116662 A116663 A116664`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet (qq-quet(AT)mindspring.com), Feb 21 2006`
	EXTENSIONS	`More terms from Robert Gerbicz (robert.gerbicz(AT)gmail.com), Jun 09 2007`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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