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A085586
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n, n^2 and n^3 all use only even digits.
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0
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0, 2, 20, 200, 202, 2000, 2002, 2020, 20000, 20002, 20020, 20200, 200000, 200002, 200020, 200200, 202000, 2000000, 2000002, 2000020, 2000200, 2002000, 2020000, 20000000, 20000002, 20000020, 20000200, 20000202, 20002000, 20002002, 20020000
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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202 is a term because 202, 202^2=4008004 and 202^3=8024024008 all use only even digits.
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PROG
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(PARI) evdigs(n) = {if (n==0, return (1)); digs = digits(n); for (i = 1, #digs, if (digs[i] % 2, return (0)); ); return (1); }
isok(n) = evdigs(n) && evdigs(n^2) && evdigs(n^3); \\ Michel Marcus, Oct 04 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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STATUS
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approved
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