id:A082130 - OEIS Search Results

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2*n-1 and 2*n+1 are semiprimes.

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17, 25, 28, 43, 46, 47, 60, 61, 71, 72, 80, 92, 93, 101, 102, 107, 108, 109, 110, 118, 124, 133, 144, 145, 150, 151, 152, 160, 161, 164, 170, 196, 197, 206, 207, 208, 223, 226, 235, 236, 258, 259, 264, 267, 268, 272, 276, 290, 291, 295 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(1)=17 because 217-1=33=311 and 217+1=35=57 are both semiprimes.`
	CROSSREFS	`Cf. A001358, A082131.` `Sequence in context: A051780 A124971 A105448 this_sequence A140609 A131275 A166666` `Adjacent sequences: A082127 A082128 A082129 this_sequence A082131 A082132 A082133`
	KEYWORD	`nonn`
	AUTHOR	`Hugo Pfoertner (hugo(AT)pfoertner.org), Apr 04 2003`
	EXTENSIONS	`More terms from Jud McCranie, Apr 04 2003`

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

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