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 A137094 Numbers n such that n and the square of n use only the digits 2, 4, 5, 6 and 7. 2
 2, 5, 24, 25, 26, 65, 74, 75, 76, 275, 474, 475, 476, 524, 525, 526, 665, 674, 675, 725, 2574, 2725, 2765, 4762, 6524, 6525, 6665, 6674, 6675, 6725, 6742, 6762, 6765, 7242, 7465, 7525, 27525, 47725, 52465, 52675, 66524, 66525, 66665, 66674, 66675, 66725, 66765, 67426, 67574, 72426, 72475, 72576, 74475, 74476, 75674, 254275, 254475, 255475, 256266 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Generated with DrScheme LINKS Jonathan Wellons, Table of n, a(n) for n=1..837 J. Wellons, Tables of Shared Digits EXAMPLE 752745425474262^2 = 566625675572427726727624444644 MATHEMATICA Module[{c={2, 4, 5, 6, 7}, nn=6}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, nn}]], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Oct 03 2019 *) CROSSREFS Sequence in context: A078125 A034692 A002507 * A209866 A130379 A229210 Adjacent sequences:  A137091 A137092 A137093 * A137095 A137096 A137097 KEYWORD base,nonn,changed AUTHOR Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008 STATUS approved

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Last modified October 16 03:15 EDT 2019. Contains 328038 sequences. (Running on oeis4.)