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Search: id:A109274
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A109274 Numbers n such that n+1 is prime, 2n+1 composite. +0
3
1, 4, 10, 12, 16, 22, 28, 40, 42, 46, 52, 58, 60, 66, 70, 72, 82, 88, 100, 102, 106, 108, 112, 126, 130, 136, 148, 150, 162, 166, 172, 178, 180, 190, 192, 196, 222, 226, 232, 238, 240, 250, 256, 262, 268, 276, 280, 282, 292, 310, 312, 316, 346, 348, 352, 358 (list; graph; listen)
OFFSET

1,2

COMMENT

Includes all terms from A109273, cf. A109275 complement of A109274 and A109273.

CROSSREFS

Cf. A109273, A109275.

Sequence in context: A095275 A117099 A026180 this_sequence A071565 A109096 A079283

Adjacent sequences: A109271 A109272 A109273 this_sequence A109275 A109276 A109277

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Jun 25 2005

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.


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