This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A125491 #24 Jul 02 2016 01:59:26 %S A125491 2016,9504,22200,31284,41412,40068,40608,43890,54990,52290,53676, %T A125491 69030,69420,77688,83720,84252,82236,80892,87750,93870,96048,97416, %U A125491 107040,129108,129504,137610,127908,156450,144936,152520 %N A125491 Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives y numbers. %C A125491 _Giovanni Resta_ computed these terms. %C A125491 As stated, we first order by common sigma value. When the common value of sigma is the same for several triples, these are then sorted (ascending) by the smallest member. When the smallest members also agree, we go on to the second smallest members, and so on, lexicographically. - _John Cerkan_, Jun 18 2016 %H A125491 John Cerkan, <a href="/A125491/b125491.txt">Table of n, a(n) for n = 1..10000</a> [Terms 1 through 1000 were computed by Donovan Johnson] %e A125491 2016 is in the sequence since sigma(1980) = sigma(2016) = sigma(2556) = 6552 = 1980 + 2016 + 2556. - _Michael B. Porter_, Jun 29 2016 %Y A125491 Cf. A125490, A125492, A137231 (x+y+z). %Y A125491 Cf. A000203 (sigma function). %K A125491 nonn %O A125491 1,1 %A A125491 _Yasutoshi Kohmoto_, Dec 11 2006 %E A125491 Definition corrected by _N. J. A. Sloane_, Nov 27 2008 %E A125491 a(13)-a(30) from _Donovan Johnson_, Apr 14 2010