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Search: id:A112786
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| A112786 |
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Starting from P0=3, the sequence list the minimum prime P1>P0 for which the expression P=P1+P0+1 is also a prime. The search then restarts from P1. |
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+0
1
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| 3, 7, 11, 17, 19, 23, 29, 31, 41, 47, 53, 59, 67, 71, 79, 83, 89, 101, 109, 113, 127, 149, 157, 173, 179, 193, 227, 229, 233, 257, 263, 277, 293, 307, 311, 331, 359, 367, 383, 389, 397, 431, 449, 457, 461, 467, 479, 487, 503, 509, 521, 541, 587, 593, 599, 601
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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3+5+1=9 is not a prime.
3+7+1=11 is a prime: 7 is in the sequence.
7+11+1=19 is a prime: 11 is in the sequence.
11+13+1=25 is not a prime.
11+17+1=29 is a prime: 17 is in the sequence.
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MAPLE
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P:=proc(n) local i, w; w:=3; for i from 3 by 1 to n do if isprime(w+ithprime(i)+1) then print(ithprime(i)); w:=ithprime(i); fi; od; end: P(500);
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CROSSREFS
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Sequence in context: A053982 A118000 A121640 this_sequence A023211 A038981 A065376
Adjacent sequences: A112783 A112784 A112785 this_sequence A112787 A112788 A112789
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KEYWORD
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easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jan 02 2006
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EXTENSIONS
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More terms from Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Mar 07 2007
Edited by N. J. A. Sloane (njas(AT)research.att.com) at the suggestion of Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jun 07 2007
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