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 A077960 #10 Feb 15 2018 20:37:04 %S A077960 18,122,118,117,226,130,136,1117,187,57,28,114,128,1111111,52628, %T A077960 111748,114663,212174,110111,35131,81414,122615,33341,4584,111243, %U A077960 25475,33171,21339,22351,41127,21621,2920,111321,2224811,223249 %N A077960 Trajectory of 18 under iteration of the map k -> A087712(k). %C A077960 a(n) = 1 for n >= 111. %C A077960 The old entry with this A-number was a duplicate of A077919. %H A077960 N. J. A. Sloane, <a href="/A077960/b077960.txt">Table of n, a(n) for n = 0..120</a> %Y A077960 Cf. A087712, A098282, A144914, A077919. %K A077960 nonn,base %O A077960 0,1 %A A077960 _N. J. A. Sloane_, Feb 10 2009