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 A225333 #17 Apr 11 2018 02:59:46 %S A225333 2,112,221112,222331112,332223331112,223332333331112, %T A225333 222333112553331112,332333221112225333331112, %U A225333 223112333222331332115553331112,222113221112333332223111223112221335333331112 %N A225333 Look-and-repeat: similar to look-and-say except frequency is repeated (seed 2). %C A225333 Look-and-repeat sequence A225329 with seed 2. %C A225333 Contains 1, 2, 3 and 5, but not 4. %C A225333 All terms end with 2 (the seed) and, starting at the fourth, with 3331112, which makes the 5 appear. %C A225333 All terms except the second begin with 2 or 3; this is a direct consequence of the look-and-repeat rule. %e A225333 The term after 112 is obtained by saying (repeating) two two 1, one one 2, which gives 221112. %Y A225333 Cf. A225329 (seed one), A225332 (continuous look-and-repeat, seed 2), A225330, A225331 (continuous look-and-repeat, seed 1). %Y A225333 Cf. A005150 (original look-and-repeat), A225224, A221646, A225212 (continuous look-and-repeat versions). %K A225333 nonn,easy,base %O A225333 1,1 %A A225333 _Jean-Christophe Hervé_, May 12 2013