The On-Line Encyclopedia of Integer Sequences (OEIS)

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A019590

Fermat's Last Theorem: a(n) = 1 if x^n + y^n = z^n has a nontrivial solution in integers, otherwise a(n) = 0.
(history; published version)

#176 by Andrey Zabolotskiy at Sat Dec 07 07:23:33 EST 2024

STATUS

editing

approved

#175 by Andrey Zabolotskiy at Sat Dec 07 07:23:22 EST 2024

LINKS

School of Mathematics and Statistics, University of St Andrews, <a href="httphttps://www-gap.dcsmathshistory.st-andandrews.ac.uk/~history/HistTopics/Fermat's_last_theorem.html/">Fermat's last theorem</a>.

STATUS

approved

editing

#174 by Joerg Arndt at Wed Feb 07 01:16:39 EST 2024

STATUS

editing

approved

#173 by Paolo P. Lava at Tue Feb 06 15:33:37 EST 2024

FORMULA

a(n) = (n-1)! mod 2, with n >= 1. - Paolo P. Lava, Feb 15 2008

a(n+1) = (1/2)*(1+(-1)^n)*a(n), with a(0)=1. - Paolo P. Lava, Apr 16 2008

STATUS

approved

editing

#172 by Joerg Arndt at Sat Dec 30 23:43:33 EST 2023

STATUS

editing

approved

#171 by Paolo P. Lava at Sat Dec 30 12:10:18 EST 2023

FORMULA

a(n) = 1 - ((n+2) mod (n+1)) + (n!^2 mod (n+1))*((n+1)!^2 mod (n+2)). - Paolo P. Lava, Aug 29 2007

STATUS

approved

editing

#170 by Charles R Greathouse IV at Mon Apr 03 10:36:09 EDT 2023

LINKS

C. K. Caldwell, The Prime Glossary, <a href="httphttps://primes.utmt5k.eduorg/glossary/page.php?sort=FermatsLastTheorem">Fermat's last theorem</a>

Discussion

Mon Apr 03

10:36

OEIS Server: https://oeis.org/edit/global/2966

#169 by Susanna Cuyler at Fri Apr 01 09:13:00 EDT 2022

STATUS

proposed

approved

#168 by Michel Marcus at Fri Apr 01 02:55:59 EDT 2022

STATUS

editing

proposed

#167 by Michel Marcus at Fri Apr 01 02:55:52 EDT 2022

REFERENCES

I. Stewart, "Fermat's Last Time-Trip", in Scientific American Nov. 1993 pp. 85.

LINKS

Ian Stewart, <a href="https://www.jstor.org/stable/24941696">Fermat's Last Time-Trip</a>, in Scientific American Nov. 1993 pp. 85.

STATUS

approved

editing