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Search: id:A089782
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| A089782 |
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Smallest prime of the form prime(k) concatenated with prime(k+n). |
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+0
5
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| 23, 37, 311, 211, 317, 523, 3767, 223, 229, 337, 1153, 241, 347, 353, 359, 1783, 367, 47137, 271, 379, 383, 283, 397, 53173, 5107, 17137, 3109, 41179, 2113, 11149, 2131, 2137, 29191, 19181, 11173, 3163, 3167, 5179, 19211, 2179, 3191, 5197, 7211, 13229
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(4) = 211 = prime(1) followed by prime(1+4).
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MATHEMATICA
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c[r_, s_] := ToExpression[ToString[r] <> ToString[s]]; Do[k = 1; While[ !PrimeQ[c[Prime[k], Prime[n + k]]], k++ ]; Print[c[Prime[k], Prime[n + k]]], {n, 1, 100}] (Propper)
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CROSSREFS
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Cf. A089783.
Adjacent sequences: A089779 A089780 A089781 this_sequence A089783 A089784 A089785
Sequence in context: A133957 A133980 A090312 this_sequence A113893 A134754 A134755
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 24 2003
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EXTENSIONS
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Corrected and extended by Ryan Propper (rpropper(AT)stanford.edu), Sep 02 2005
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