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Search: id:A094105
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| A094105 |
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Primes of form prime(n)+2*prime(n+1). |
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+0
1
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| 13, 19, 29, 37, 47, 127, 137, 181, 283, 307, 317, 367, 389, 541, 563, 577, 587, 677, 743, 811, 839, 907, 929, 937, 947, 1031, 1093, 1283, 1297, 1453, 1489, 1567, 1801, 1847, 1913, 2027, 2347, 2381, 2467, 2477, 2617, 2647, 2657, 2729, 2749, 2777, 2803, 2819
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Zak Seidov, Table of n, a(n) for n = 1..1000.
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EXAMPLE
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a(9) = 89 + 2*97 = 283.
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MATHEMATICA
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f[n_] := (Prime[n] + 2Prime[n + 1]); f[ # ] & /@ Select[Range[160], PrimeQ[f[ # ]] &] (from Robert G. Wilson v)
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PROGRAM
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(PARI) q=2; forprime(p=3, 1000, if(isprime(r=q+2*p), print1(r, ", ")); q=p)
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CROSSREFS
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Sequence in context: A123840 A063640 A092104 this_sequence A073620 A089391 A038954
Adjacent sequences: A094102 A094103 A094104 this_sequence A094106 A094107 A094108
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KEYWORD
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nonn,easy
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), May 02 2004
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EXTENSIONS
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Corrected and extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de) and Robert G. Wilson v (rgwv(AT)rgwv.com), May 07 2004
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