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 A121866 #9 Jul 06 2018 04:45:45 %S A121866 8,14,40,262,352264,1484585652808,86279953484628827950028778425712, %T A121866 7605980144769110332172415576695326607722497051737088217125532622141954502574772559281862172625424410193559821272357826 %N A121866 Same as A121864 but start at 8 instead of 16. %C A121866 The convention used here is that e.g. 9_8 = 9. %C A121866 The next term is too large to include. %D A121866 David Applegate, Marc LeBrun and N. J. A. Sloane, Descending Dungeons and Iterated Base-Changing, in "The Mathematics of Preference, Choice and Order: Essays in Honor of Peter Fishburn", edited by Steven Brams, William V. Gehrlein and Fred S. Roberts, Springer, 2009, pp. 393-402. %H A121866 David Applegate, Marc LeBrun and N. J. A. Sloane, <a href="https://arxiv.org/abs/math/0611293">Descending Dungeons and Iterated Base-Changing</a>, arXiv:math/0611293 [math.NT], 2006-2007. %H A121866 David Applegate, Marc LeBrun, N. J. A. Sloane, <a href="https://www.jstor.org/stable/40391135">Descending Dungeons, Problem 11286</a>, Amer. Math. Monthly, 116 (2009) 466-467. %K A121866 nonn,base %O A121866 3,1 %A A121866 _N. J. A. Sloane_, Sep 05 2006