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 A189075 #15 Apr 01 2020 08:22:50 %S A189075 1,1,2,4,8,16,31,60,114,215,402,7464,1375,2520,4593,8329,15036,27027, %T A189075 48389,86314,153432 %N A189075 Erroneous version of A188900. %C A189075 a(11) is actually 746; there is a typo in Heubach et al. %H A189075 S. Heubach, T. Mansour and A. O. Munagi, <a href="https://web.math.rochester.edu/misc/ojac/vol4/CompType21.pdf">Avoiding Permutation Patterns of Type (2,1) in Compositions</a>, Online Journal of Analytic Combinatorics, 4 (2009). %K A189075 dead %O A189075 0,3