id:A115396 - OEIS Search Results

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Smallest prime p such that p-/+2n are semiprimes.

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23, 29, 71, 17, 59, 37, 71, 41, 67, 71, 43, 109, 59, 67, 173, 83, 89, 151, 103, 89, 127, 101, 131, 113, 127, 109, 131, 113, 127, 193, 157, 157, 181, 179, 229, 163, 193, 191, 211, 223, 223, 239, 241, 211, 211, 211, 271, 281, 241, 241, 263, 307, 307, 373, 293 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Cf. A063643 Primes p such that p+/-2 are semiprimes, A117328 Primes p such that p+/-4 are semiprimes.`
	EXAMPLE	`a(100)=571 because 571-2100=371=753 (semiprime), 571+2100=771=3257 (semiprime).`
	CROSSREFS	`Cf. A063643.` `Sequence in context: A046124 A092518 A110584 this_sequence A029541 A068714 A036267` `Adjacent sequences: A115393 A115394 A115395 this_sequence A115397 A115398 A115399`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Mar 08 2006`

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

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