id:A086097 - OEIS Search Results

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Numbers n such that n and n+1 are semiprimes with a semiprime number of 1's in their binary representation.

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57, 85, 141, 177, 201, 393, 537, 553, 633, 697, 717, 745, 921, 933, 1141, 1285, 1345, 1477, 1641, 1713, 1761, 1981, 1982, 2041, 2181, 2361, 2433, 2558, 2577, 2605, 2761, 2941, 2977, 3062, 3117, 3241, 3273, 3326, 3397, 3578, 3721, 3777, 3901, 3902, 3957 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`3721 is the first square entry. Conjecture: sequence is infinite.`
	CROSSREFS	`Cf. A001358, A000120, A086096.` `Sequence in context: A106662 A087922 A087921 this_sequence A145554 A111320 A147468` `Adjacent sequences: A086094 A086095 A086096 this_sequence A086098 A086099 A086100`
	KEYWORD	`nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jul 09 2003`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

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