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A060711
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Smallest number whose digit sum is n^4.
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1
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1, 79, 999999999, 49999999999999999999999999999, 4999999999999999999999999999999999999999999999999999999999999999999999, 999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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FORMULA
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a(n) >= 10^(n^4/9) - 1.
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MATHEMATICA
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Do[ a = {}; While[ Apply[ Plus, a ] + 9 < n^4, a = Append[ a, 9 ] ]; If[ Apply[ Plus, a ] != n^4, a = Prepend[ a, n^4 - Apply[ Plus, a ] ] ]; Print[ FromDigits[ a ] ], {n, 1, 6} ]
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PROG
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(PARI) { for (n=1, 9, s=n^4; x=s\9; d=s - 9*x; write("b060711.txt", n, " ", (d+1)*10^x - 1); ) } \\ Harry J. Smith, Jul 10 2009
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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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STATUS
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approved
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