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 A085694 #11 Dec 14 2022 16:26:01 %S A085694 1,2,2,2,3,2,2,3,2,2,3,3,3,3,4,2,2,3,2,2,3,3,3,3,4,2,2,3,2,2,3,3,3,3, %T A085694 4,3,3,3,4,3,3,3,4,3,3,3,4,4,4,4,4,5,2,2,3,2,2,3,3,3,3,4,2,2,3,2,2,3, %U A085694 3,3,3,4,3,3,3,4,3,3,3,4,3,3,3,4,4,4,4,4,5,2,2,3,2,2,3,3,3,3,4 %N A085694 Let f(0) = 1, f(1) = 12, f(2) = 223, f(3) = 3334, f(4) = 44445, f(5) = 555556, etc. Sequence gives limiting value of f(0), f(f(0)), f(f(f(0))), ... %C A085694 The positions where 1, 2, 3, 4, 5, ... appear are 1, 2, 5, 15, 52, ... (Bell numbers A000110). %Y A085694 Cf. A085693, A000110, A048993 (the number of occurrences of k in n-th block). %K A085694 nonn,easy %O A085694 1,2 %A A085694 _Philippe Deléham_, Aug 14 2003 %E A085694 Extended by _Philippe Deléham_, Jun 10 2005