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A031368
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Primes p(2n-1).
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4
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 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
| with(numtheory): A031368 := n->ithprime(2*n+1);
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PROG
| (MAGMA) [ NthPrime(2*n-1): n in [1..1000] ]; // Vincenzo Librandi, Apr 11 2011
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CROSSREFS
| Cf. A000040, A031215.
Sequence in context: A003627 A103203 A105875 * A020613 A135478 A019381
Adjacent sequences: A031365 A031366 A031367 * A031369 A031370 A031371
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KEYWORD
| nonn
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AUTHOR
| Jeff Burch (jmburch(AT)osprey.smcm.edu)
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