id:A135502 - OEIS Search Results

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Admirable numbers in the middle of twin primes.

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12, 30, 42, 102, 138, 270, 282, 618, 642, 822, 1488, 1698, 1878, 2082, 2238, 2382, 2658, 2802, 3462, 3558, 3918, 4638, 4722, 5442, 6198, 6702, 8538, 8598, 9678, 10938, 12162, 12378, 12822, 12918, 13218, 13722, 13758, 13998, 14082, 16062, 17418 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Numbers n such that n is admirable, n-1 is prime and n+1 is prime.`
	FORMULA	`A014574 INTERSECT A111592. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 10 2008`
	EXAMPLE	`30 is in the sequence, as 29=30-1 and 31=30+1 are a pair of twin primes.`
	CROSSREFS	`Cf. A111592, A001359, A006512.` `Sequence in context: A093507 A145470 A108278 this_sequence A125582 A031107 A019557` `Adjacent sequences: A135499 A135500 A135501 this_sequence A135503 A135504 A135505`
	KEYWORD	`easy,nonn`
	AUTHOR	`Olaf Voss (richyfourtythree(AT)yahoo.com), Feb 09 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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