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A075240
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Smallest prime whose base n reversal is not a prime.
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0
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2, 3, 11, 5, 13, 7, 11, 29, 19, 11, 19, 13, 29, 23, 19, 17, 23, 19, 31, 29, 29, 23, 29, 37, 37, 29, 31, 29, 43, 31, 37, 37, 59, 59, 43, 37, 41, 59, 43, 41, 59, 43, 47, 47, 53, 47, 59, 61, 59, 61, 59, 53, 67, 59, 59, 59, 61, 59, 73, 61, 71, 67, 79, 71, 89, 67, 71, 101, 89
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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COMMENTS
| All primes show up in the sequence eventually.
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EXAMPLE
| a(4) = 11 because 11 (2) = 13 and 11 (3) = 19 but 11 (4) = 14.
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MATHEMATICA
| a = {}; Do[k = 1; While[ PrimeQ[ FromDigits[ Reverse[ IntegerDigits[ Prime[k], n]], n]], k++ ]; a = Append[a, Prime[k]], {n, 2, 70}]; a
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CROSSREFS
| Sequence in context: A084743 A030391 A039654 * A137332 A084047 A145077
Adjacent sequences: A075237 A075238 A075239 * A075241 A075242 A075243
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KEYWORD
| base,easy,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 09 2002
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