Possibly interesting sequence

franktaw at netscape.net franktaw at netscape.net
Mon Aug 11 20:50:53 CEST 2008


Franklin T. Adams-Watters

-----Original Message-----
From: David Wilson <dwilson at gambitcomm.com>

I found a puzzle site that poses in effect the following problem:

For a set S of positive integers, call n = SUM(k in S, k) good when
SUM(k in S, 1/k) = 1. Which integers are good?

Fun for you programmers.

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