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A275419 Representable integers n that are not the inverse of their inverse in binary64 (double precision) IEEE 754 floating-point arithmetic (Version where n and 1/(1/n) are unequal).

%I A275419 #14 Dec 02 2016 20:06:02
%S A275419 49,93,98,99,103,105,107,117,123,186,196,197,198,206,210,211,214,221,
%T A275419 227,234,237,239,243,245,246,249,253,372,391,392,393,394,396,412,415,
%U A275419 417,420,422,425,428,442,443,445,454,459,468,474,478,479,483,486,489,490,491,492,497,498,499,501
%N A275419 Representable integers n that are not the inverse of their inverse in binary64 (double precision) IEEE 754 floating-point arithmetic (Version where n and 1/(1/n) are unequal).
%C A275419 Note that n*(1/n) and 1 are unequal for a different integer sequence.
%H A275419 Charles R Greathouse IV, <a href="/A275419/b275419.txt">Table of n, a(n) for n = 1..10000</a>
%o A275419 (C) int is(int n) {
%o A275419   double d = n;
%o A275419   double di = 1/d;
%o A275419   return 1/di != d;
%o A275419 } /* _Charles R Greathouse IV_, Jul 29 2016 */
%K A275419 nonn,base,fini,less
%O A275419 1,1
%A A275419 _Julien Freslon_, Jul 27 2016