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A309541 Representable positive integers n that are not the inverse of their inverse in binary64 (double precision) IEEE 754 floating-point arithmetic (Version where 1 and n*(1/n) are unequal). 0
49, 98, 103, 107, 161, 187, 196, 197, 206, 214, 237, 239, 249, 253, 322, 347, 374, 389, 392, 394, 412, 417, 425, 428, 443, 474, 478, 479, 491, 498, 499, 501, 503, 506, 509, 561, 569, 644, 685, 691, 694, 725, 729, 735, 737, 748, 753, 765, 778, 779, 784, 788, 789, 797, 809, 817, 823, 824, 829, 833, 834, 837, 841, 849, 850 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..65.

Efstratios Gallopoulos, Scientific Computation I, five terms provided (in Greek)

Mark, comment on blog post "Rundungsfehler im Flash Player?", eight terms (in German)

koDoz, comment in thread "Welche Grenzwerte gelten für Zahlen, Strings usw?", nine terms (in German)

PROG

(Python 2 or Python 3)

for i in range(1, 1000):

  if i*(1./i) != 1: print(i)

CROSSREFS

See A275419 for the n != 1/(1/n) version.

Sequence in context: A044030 A165339 A131601 * A174386 A044138 A043394

Adjacent sequences:  A309538 A309539 A309540 * A309542 A309543 A309544

KEYWORD

nonn,fini,less

AUTHOR

Adam M. Scherlis, Aug 06 2019

STATUS

approved

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Last modified April 18 15:40 EDT 2021. Contains 343089 sequences. (Running on oeis4.)