%I #53 Oct 10 2020 12:15:38
%S 6,10,14,15,21,22,26,33,34,35,38,39,46,51,55,57,58,62,65,69,74,82,85,
%T 86,87,91,93,95,106,111,123,133,145,155,159,185,203,215,253,265,287,
%U 319,493,583,731,851,1073
%N Tatsuru Watanabe's set of 47 squarefree numbers whose reciprocals add to 1, with the property that each number has exactly two distinct prime factors.
%C This is one of the 17 sets given in the link below.
%H Carlos Rivera, <a href="http://www.primepuzzles.net/problems/prob_035.htm">Problem 35. More wrong turns...</a>, The Prime Puzzles and Problems Connection.
%H Tatsuru Watanabe, <a href="https://arxiv.org/abs/2009.03275">New examples of the representation of 1 by the sum of reciprocals of semiprime numbers</a>, arXiv:2009.03275 [math.NT], 2020.
%H <a href="/index/Ed#Egypt">Index entries for sequences related to Egyptian fractions</a>
%Y Cf. A201650.
%K nonn,fini,full
%O 1,1
%A _Michel Marcus_, Sep 08 2020