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Search: id:A066050
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| A066050 |
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Average of divisors of n (sigma(n)/d(n)) is greater than average of divisors for all k < n. |
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+0
1
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| 1, 2, 3, 4, 5, 7, 9, 10, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,1000
Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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4 is included because sigma(4)/d(4) = 7/3 is greater than sigma(k)/d(k) for k = 1, 2, or 3.
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PROGRAM
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(PARI) { n=x=0; for (m=1, 10^9, a=sigma(m)/numdiv(m); if (a > x, x=a; write("b066050.txt", n++, " ", m); if (n==1000, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Nov 08 2009]
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CROSSREFS
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Sequence in context: A164563 A160718 A122090 this_sequence A004050 A123538 A092999
Adjacent sequences: A066047 A066048 A066049 this_sequence A066051 A066052 A066053
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet Dec 29 2001
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EXTENSIONS
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OFFSET changed from 0,2 to 1,2 by Harry J. Smith (hjsmithh(AT)sbcglobal.net), Nov 08 2009
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