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A167470
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Primes p such that (p reversed)+ 8 is a square.
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1
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29, 37, 71, 127, 293, 311, 353, 359, 613, 631, 677, 881, 1049, 1423, 1481, 1657, 1693, 1801, 2953, 2999, 3761, 6101, 6571, 6959, 7103, 7109, 7121, 7127, 8291, 8821, 8837, 10601, 10883, 12161, 12547, 14249, 14411, 16943, 16979, 18217, 18433, 18671, 29021
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OFFSET
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1,1
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LINKS
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EXAMPLE
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29 is in the sequence because 92+8 = 10^2.
37 is in the sequence because 73+8 = 9^2.
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MATHEMATICA
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Select[Prime[Range[40000]], IntegerQ[Sqrt[FromDigits[Reverse[IntegerDigits[#]]] + 8]]&] (* Vincenzo Librandi, Sep 15 2013 *)
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PROG
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(Magma) [p: p in PrimesUpTo(29021) | IsSquare(q+8) where q is Seqint(Reverse(Intseq(p)))]; // Vincenzo Librandi, Sep 15 2013
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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Removed the constraint on the squares (an arbitrary large number) by R. J. Mathar, Oct 28 2010
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STATUS
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approved
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