Search: a099102 -id:a099102
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A099103
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Natural numbers n with more digits than Euler totient phi(n).
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+10
1
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10, 12, 14, 15, 16, 18, 20, 24, 30, 100, 102, 104, 105, 106, 108, 110, 111, 112, 114, 115, 116, 117, 118, 119, 120, 122, 123, 124, 126, 128, 129, 130, 132, 134, 135, 136, 138, 140, 141, 142, 144, 146, 147, 148, 150, 152, 153, 154, 156, 158, 160, 162, 164, 165
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OFFSET
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1,1
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COMMENTS
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This sequence is an indirect comment on the referenced comment of R. K. Guy concerning the occurrence of 301-digit numbers.
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LINKS
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EXAMPLE
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10 is in the sequence because 2, the number of digits in 10, is more than 1, the number of digits in 4 = phi(10).
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MATHEMATICA
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Select[Range[200], IntegerLength[#] > IntegerLength[EulerPhi[#]] &] (* Harvey P. Dale, Dec 14 2010 *)
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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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STATUS
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approved
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