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 A179039 Emirps with a single 7 as the only prime digit. 1
 17, 71, 79, 97, 107, 167, 179, 701, 709, 761, 769, 907, 967, 971, 1097, 1471, 1487, 1741, 1789, 1847, 1867, 1879, 1979, 7481, 7649, 7681, 7699, 7841, 7901, 7949, 9467, 9479, 9497, 9679, 9749, 9769, 9781, 9791, 9871, 9967, 10007, 10067, 10079, 10487 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA emirpQ[n_] := Module[{idn=IntegerDigits[n], ridn}, ridn=Reverse[idn]; idn != ridn && PrimeQ[FromDigits[ridn]]]; only7Q[n_] := DigitCount[n, 10, 7] == 1 && Total[DigitCount[n, 10, {2, 3, 5}]] == 0; Select[Select[Prime[Range[1500]], emirpQ], only7Q] (* Harvey P. Dale, Jan 06 2011 *) CROSSREFS Cf. A006567, A179038. Sequence in context: A183943 A180532 A179038 * A152295 A039407 A043230 Adjacent sequences: A179036 A179037 A179038 * A179040 A179041 A179042 KEYWORD base,nonn AUTHOR Lekraj Beedassy, Jun 25 2010 EXTENSIONS Terms confirmed by Ray Chandler, Jul 13 2010 Definition clarified by Harvey P. Dale, Jan 06 2011 STATUS approved

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Last modified December 9 04:13 EST 2022. Contains 358698 sequences. (Running on oeis4.)