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 A082854 #5 Jan 11 2024 13:11:09 %S A082854 1,1,1,2,1,2,3,4,5,1,2,3,4,5,6,7,8,9,10,11,12,13,14,1,2,3,4,5,6,7,8,9, %T A082854 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, %U A082854 33,34,35,36,37,38,39,40,41,42,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 %N A082854 Integers 1 to Catalan(n) followed by integers 1 to Catalan(n+1) etc. %F A082854 a(n) = A082853(n)+1. %Y A082854 Cf. A082853, A002260, A000108. %K A082854 nonn %O A082854 0,4 %A A082854 _Antti Karttunen_, Apr 17 2003