The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A260087 Larger of amicable pair (x, y) as they are listed in A259933. 7

%I #16 Jul 15 2015 18:03:18

%S 284,1210,2924,5564,6368,10856,14595,18416,66992,71145,76084,87633,

%T 88730,124155,123152,139815,153176,168730,176336,180848,203432,202444,

%U 365084,389924,430402,399592,455344,486178,514736,525915,669688,686072,652664,691256,712216,783556,796696,863835,901424,980984,1043096,1125765

%N Larger of amicable pair (x, y) as they are listed in A259933.

%C Another version of A002046.

%C First differs from A002046 at a(9).

%H Laszlo Hars, <a href="https://www.mail-archive.com/julia-users@googlegroups.com/msg04022.html">Performance compared to mathematica</a> Julia-users (2014)

%H Khelleos, <a href="http://www.cyberforum.ru/lisp/thread386611.html">Amicable numbers</a>, CyberForum.ru (2011)

%H OEIS Wiki, <a href="https://oeis.org/wiki/Amicable_numbers">Amicable numbers</a> (This page needs work)

%H Wikipédia, <a href="https://hu.wikipedia.org/wiki/Barátságos_számok">Barátságos számok</a> (contains a mistake: A063990 should be replaced with A259933)

%F a(n) = A259933(2n) = A259953(n) - A259933(2n-1) = A259953(n) - A260086(n).

%Y Cf. A002046, A063990, A259180, A259933, A259953, A260086.

%K nonn

%O 1,1

%A _Omar E. Pol_, Jul 15 2015

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 1 15:48 EDT 2024. Contains 373025 sequences. (Running on oeis4.)