id:A092109 - OEIS Search Results

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Primes p such that p+3 is a semiprime.

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3, 7, 11, 19, 23, 31, 43, 59, 71, 79, 83, 103, 131, 139, 163, 191, 199, 211, 223, 251, 271, 311, 331, 359, 379, 383, 419, 443, 463, 479, 499, 523, 563, 619, 631, 659, 691, 743, 839, 859, 863, 883, 911, 919, 971, 1039, 1091, 1123, 1151, 1171, 1223, 1231, 1259 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Primes p such that p-3 is semiprime are in A089531; n and 2n+3 both prime, A023204; 2*A063908(n)-3=A092109(n); n, 2n-3, and 2n+3 prime, A092110.`
	FORMULA	`a(n)=2*A063908(n)-3;`
	CROSSREFS	`Cf. A023204, A089531, A063908, A092110.` `Sequence in context: A080978 A002145 A101288 this_sequence A117991 A118260 A018805` `Adjacent sequences: A092106 A092107 A092108 this_sequence A092110 A092111 A092112`
	KEYWORD	`easy,nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Feb 21 2004`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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