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 A291787 #30 Oct 09 2017 15:25:42 %S A291787 45,48,56,60,80,88,92,94,95,96,112,120,160,176,184,188,190,216,252, %T A291787 324,378,486,567,594,738,876,1032,1224,1488,1776,2112,2624,2656,2672, %U A291787 2680,2976,3552,4224,5248,5312,5344,5360,5952,7104,8448,10496,10624 %N A291787 Trajectory of 45 under repeated application of the map k -> A291784(k). %C A291787 It may be that every trajectory under iteration of the map k -> A291784(k) which increases indefinitely will eventually merge with this sequence. This is certainly true for the terms 45 through 152 of A291788. - _N. J. A. Sloane_, Sep 24 2017 %D A291787 Richard K. Guy, Unsolved Problems in Number Theory, 3rd Edition, Springer, 2004. See Section B41, p. 147. %H A291787 N. J. A. Sloane, <a href="/A291787/b291787.txt">Table of n, a(n) for n = 0..10000</a> %H A291787 N. J. A. Sloane, Three (No, 8) Lovely Problems from the OEIS, Experimental Mathematics Seminar, Rutgers University, Oct 05 2017, <a href="https://vimeo.com/237029685">Part I</a>, <a href="https://vimeo.com/237030304">Part 2</a>, <a href="https://oeis.org/A290447/a290447_slides.pdf">Slides.</a> (Mentions this sequence) %H A291787 C. R. Wall, <a href="http://www.jstor.org/stable/2323173">Unbounded sequences of Euler-Dedekind means</a>, Amer. Math. Monthly, 92 (1985), 587. %F A291787 a(n) = 2*a(n-7) for n >= 35, which proves this is unbounded. [Guy, Wall] %Y A291787 Cf. A000010, A001615, A291784, A291785, A291786, A291788. %K A291787 nonn %O A291787 0,1 %A A291787 _N. J. A. Sloane_, Sep 02 2017 %E A291787 More terms from _Hugo Pfoertner_, Sep 03 2017