id:A108610 - OEIS Search Results

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Semiprimes with prime sum of digits and prime sum of prime factors.

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34, 58, 142, 214, 274, 298, 382, 454, 478, 562, 694, 838, 922, 1042, 1138, 1198, 1282, 1318, 1642, 1714, 2038, 2098, 2122, 2182, 2302, 2458, 2638, 2854, 2902, 2962, 3334, 3394, 3442, 3574, 3754, 3862, 4054, 4162, 4258, 4474, 4618, 4762, 5314, 5374, 5422 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Intersection of A108605 and A108606. All terms are even. Cf. A001358 semiprimes, A101605 3-almost primes, A108605 semiprimes with prime sum of factors, A108606 semiprimes with prime sum of digits.`
	EXAMPLE	`34=2*17 (semiprime), with 3+4=7 and 2+17=19 both prime.`
	CROSSREFS	`Cf. A001358, A101605, A108605, A108606.` `Sequence in context: A055574 A103558 A103686 this_sequence A155486 A119454 A115159` `Adjacent sequences: A108607 A108608 A108609 this_sequence A108611 A108612 A108613`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jun 12 2005`

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

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