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A061660
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Numbers k > 1 such that, in base 6, k and k^2 contain the same digits in the same proportion.
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12
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3697, 3940, 4802, 5845, 5905, 21127, 21715, 22182, 22867, 22897, 23380, 23640, 24367, 26815, 28812, 28910, 32192, 33705, 33815, 35000, 35065, 35070, 35430, 35977, 37082, 37712, 40277, 44535, 122915, 125947, 126762, 128350, 129670, 130290, 133092, 134397
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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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3697 = 25041_6 and 3697^2 = 1204540521_6.
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MAPLE
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p:= n-> add(x^i, i=convert(n, base, 6)):
a:= proc(n) option remember; local k;
for k from 1+`if`(n=1, 0, a(n-1))
while p(k)*2<>p(k^2) do od; k
end:
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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