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A137063
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Numbers k such that k and k^2 use only the digits 1, 5, 7, 8 and 9.
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1
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1, 9, 9859, 99859, 771891, 987917, 8879859, 75879891, 75891891, 89191859, 98575859, 881575859, 985889891, 999575859, 999787917, 7181581859, 8881991891, 8885875859, 8888171859, 8897857917, 71775871859, 88758771891, 88881717917, 99597789891, 99857857917, 99997857917, 99999575859, 718175178891, 871711871891, 888571871891
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OFFSET
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1,2
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COMMENTS
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Generated with DrScheme.
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LINKS
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EXAMPLE
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87175179719859^2 = 7599511959189715877718979881.
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
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STATUS
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approved
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