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%I #5 Mar 31 2012 13:21:10
%S 15,30,31,45,47,60,61,62,63,90,94,95,120,122,124,125,126,127,165,173,
%T 175,180,181,188,189,190,191,240,244,245,248,250,252,253,254,255,330,
%U 346,350,351,360,362,376,378,380,381,382,383,480,488,490,496,500
%N Integers i such that 13*i = A048720bi(21,i), but 15*i <> A048720bi(23,i).
%C Here * stands for ordinary multiplication and A048720 is the carryless (GF(2)[X]) multiplication.
%H <a href="/index/Ge#GF2X">Index entries for sequences operating on GF(2)[X]-polynomials</a>
%Y Cf. Setwise difference of A115772 and A115774. A115781 shows this sequence in binary.
%K nonn
%O 1,1
%A _Antti Karttunen_, Jan 30 2006
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