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%I #20 Apr 02 2020 20:07:50
%S 4,9,10,14,16,18,22,25,26,28,30,34,36,40,46,48,49,54,55,56,62,63,65,
%T 66,68,74,75,76,80,81,84,88,90,94,96,100,104,105,114,115,116,119,120,
%U 121,126,132,135,138,142,144,153,154,155,156,160,162,166,168,170,174,178,182,183,184,185,190,192,196,198,202,204
%N List of winning positions in Barry Cipra's Factor Subtractor game.
%C A positive integer n is in the sequence if and only if it has a proper factorization, n=hk, for which neither n-h nor n-k is in the sequence. (No prime is in the sequence, because no prime has a proper factorization.) [Barry Cipra, Mar 07 2012]
%D Barry Cipra, Personal communication, Mar 02 2012
%D Barry Cipra, Factor Subtractor, 2012; reprinted in "Barrycades and Septoku: Papers in Honor of Martin Gardner and Tom Rogers", ed. Thane Plambeck and Tomas Rokicki, MAA Press, 2020, pp. 59-62.
%H Matthew Richey, <a href="/A208980/b208980.txt">Table of n, a(n) for n = 1..85667</a>
%H Barry Cipra, <a href="/A208980/a208980.txt">Factor Subtractor</a>, 2012
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Mar 04 2012
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