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 A281369 #9 Feb 28 2017 12:45:06 %S A281369 25,34,27,45,52,65,64,82,84,104,67,86,121,71,94,81,102,114,195,253, %T A281369 295,305,249,276,151,154,164,168,170,129,146,194,184,222,236,215,189, %U A281369 455,526,583,600,618,915,979,996,1032,1463,1541,1544,1752,1887,2348,2378,2195,2485,1279,1298,673,591,589 %N A281369 Orbit of 25 under repeated applications of the map m -> A280864(m). %C A281369 It is a strong conjecture that A280864 is a permutation of the positive integers. The orbit containing 25 appears to be the first infinite orbit. See A281370 for the orbit of 25 under the inverse permutation, and see A280864 for other orbits (there are several small cycles). %H A281369 N. J. A. Sloane, <a href="/A281369/b281369.txt">Table of n, a(n) for n = 1..289</a> %Y A281369 Cf. A280864, A281370. %K A281369 nonn %O A281369 1,1 %A A281369 _N. J. A. Sloane_, Feb 03 2017