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A180555
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Primes that become a different prime under the mapping 6 <=> 7.
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0
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61, 71, 163, 173, 601, 619, 643, 701, 719, 743, 1609, 1621, 1709, 1721, 1861, 1871, 2689, 2789, 3361, 3371, 3671, 3761, 4261, 4271, 4363, 4373, 4603, 4621, 4651, 4703, 4721, 4751, 4861, 4871, 5563, 5573, 5641, 5669, 5683, 5741, 5779, 5783, 5869, 5879
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..44.
Index to Primes, Primes that become a different prime under some mapping.
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MATHEMATICA
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fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 6] || MemberQ[id, 7]) && PrimeQ[ FromDigits[ id /. {6 -> 7, 7 -> 6}] ]]; Select[ Prime@ Range@ 780, fQ]
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CROSSREFS
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Cf. A171040, A175791, A180517 thru A180559, A175789, A180560, A180561.
Sequence in context: A043993 A165287 A064229 * A039478 A109549 A139944
Adjacent sequences: A180552 A180553 A180554 * A180556 A180557 A180558
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KEYWORD
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base,nonn
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AUTHOR
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Zak Seidov and Robert G. Wilson v, Sep 09 2010
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STATUS
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approved
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