id:A109404 - OEIS Search Results

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Numbers n such that sum of n-th and (n+1)-st semiprimes is a prime.

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3, 5, 7, 8, 10, 11, 13, 22, 25, 27, 29, 37, 46, 51, 52, 76, 83, 86, 92, 104, 111, 113, 115, 123, 132, 140, 149, 190, 213, 218, 222, 233, 242, 274, 280, 281, 286, 298, 303, 307, 309, 336, 340, 346, 351, 379, 381, 395, 402, 415, 424, 444, 449, 463, 477, 478, 490 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`3 is OK because sp(3)=9, sp(3)=10 and 9+10=19 (prime); sp(n)=n-th semiprime.`
	CROSSREFS	`Cf. A092191 = numbers n such that sum of n-th and (n+1)-st semiprimes is a semiprime.` `Sequence in context: A049068 A071977 A159560 this_sequence A083034 A144077 A047392` `Adjacent sequences: A109401 A109402 A109403 this_sequence A109405 A109406 A109407`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jun 27 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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