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A239504
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Number of digits in the decimal expansion of n^10 (A008454).
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0
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1, 1, 4, 5, 7, 7, 8, 9, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19
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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = floor(10*log_10(n))+1 for n>0, a(0) = 1.
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EXAMPLE
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a(1) = 1, because 1^10 = 1.
a(2) = 4, because 2^10 = 1024.
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MATHEMATICA
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Join[{1}, IntegerLength[Range[80]^10]] (* Harvey P. Dale, Jun 29 2021 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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