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 A365838 #22 Sep 28 2023 12:11:35 %S A365838 2,1,1,1,1,3,1,5,1,5,2,1,5,2,2,1,1,5,2,2,1,2,2,1,1,5,2,2,1,2,2,3,2,3, %T A365838 1,1,5,2,2,1,2,2,3,2,3,3,2,4,2,1,1,5,2,2,1,2,2,3,2,3,3,2,4,2,3,2,4,3, %U A365838 2,1,1,1,5,2,2,1,2,2,3,2,3,3,2,4,2,3,2,4,3,2,1,3,2,4,3,2,2,2,1,1 %N A365838 a(1)=2; thereafter extend the sequence by appending its nondecreasing run transform, recompute the nondecreasing run transform, append it, and so on. %C A365838 The nondecreasing run transform replaces each run of weakly increasing terms with a single value which is the length of that run. %H A365838 Neal Gersh Tolunsky, <a href="/A365838/b365838.txt">Table of n, a(n) for n = 1..9294</a> (first 25 rows) %H A365838 Neal Gersh Tolunsky, <a href="/A365838/a365838.png">Ordinal transform on the first 35 iterations of the sequence</a> %e A365838 Irregular triangle in which each row (after the initial 2) is the nondecreasing run transform of the concatenation of the previous rows: %e A365838 2; %e A365838 1; %e A365838 1, 1; %e A365838 1, 3; %e A365838 1, 5; %e A365838 1, 5, 2; %e A365838 1, 5, 2, 2, 1; %e A365838 1, 5, 2, 2, 1, 2, 2, 1; %e A365838 1, 5, 2, 2, 1, 2, 2, 3, 2, 3, 1; %e A365838 1, 5, 2, 2, 1, 2, 2, 3, 2, 3, 3, 2, 4, 2, 1; %e A365838 ... %Y A365838 Cf. A365836, A306211. %K A365838 nonn,tabf %O A365838 1,1 %A A365838 _Neal Gersh Tolunsky_, Sep 20 2023