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A102535 Integers n such that -n is representable as the product of the sum of three nonzero integers with the sum of their reciprocals: -n=(x+y+z)*(1/x+1/y+1/z). 6
4, 10, 11, 12, 18, 19, 20, 22, 25, 28, 29, 30, 31, 32, 36, 39, 40, 42, 43, 44, 48, 50, 51, 52, 54, 56, 58, 59, 61, 67, 69, 70, 72, 76, 78, 84, 85, 86, 88, 89, 91, 92, 95, 96, 100, 101, 102, 103, 104, 105, 107, 108, 109, 112, 113, 115, 116, 120, 122, 123 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Also numbers k such that A309144(k) > 0. - Seiichi Manyama, Jul 14 2019
LINKS
Allan J. MacLeod, Knight's Problem
Allan J. MacLeod, Solutions for 1 <= n <= 1000 (copy from MacLeod's website)
CROSSREFS
Sequence in context: A045855 A244216 A240580 * A074226 A106631 A120261
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 17 2005
STATUS
approved

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Last modified May 23 08:52 EDT 2024. Contains 372760 sequences. (Running on oeis4.)