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A114019
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Largest n-digit prime whose digit reversal is also prime.
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3
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7, 97, 991, 9967, 99989, 999983, 9999971, 99999827, 999999893, 9999999967, 99999999977, 999999999959, 9999999999799, 99999999999959, 999999999999877, 9999999999999571, 99999999999997997, 999999999999999737
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OFFSET
| 1,1
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MATHEMATICA
| f[n_] := Block[{k = 10^n}, While[ !PrimeQ[k] || !PrimeQ[FromDigits@Reverse@IntegerDigits@k], k-- ]; k]; Array[f, 19] (* Robert G. Wilson v *)
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CROSSREFS
| Cf. A113018.
Sequence in context: A071361 A007810 A146758 * A178007 A127892 A125590
Adjacent sequences: A114016 A114017 A114018 * A114020 A114021 A114022
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 12 2005
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Nov 19 2005
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