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Search: id:A031368
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| 2, 5, 11, 17, 23, 31, 41, 47, 59, 67, 73, 83, 97, 103, 109, 127, 137, 149, 157, 167, 179, 191, 197, 211, 227, 233, 241, 257, 269, 277, 283, 307, 313, 331, 347, 353, 367, 379, 389, 401, 419, 431, 439, 449, 461, 467, 487, 499, 509, 523, 547, 563
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Appeared as a puzzle in "Stickelers", a nationally distributed feature, by Terry Stickels, Sep 28 2006. - Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Sep 28 2006
Also every second prime starting with 2. - Cino Hilliard (hillcino368(AT)hotmail.com), Dec 02 2007
Central terms of the triangle in A005145. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 05 2009]
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MAPLE
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with(numtheory): A031368 := n->ithprime(2*n+1);
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CROSSREFS
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Cf. A000040, A031215.
Sequence in context: A003627 A103203 A105875 this_sequence A020613 A135478 A019381
Adjacent sequences: A031365 A031366 A031367 this_sequence A031369 A031370 A031371
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KEYWORD
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nonn
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AUTHOR
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Jeff Burch (jmburch(AT)osprey.smcm.edu)
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