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 A033961 #7 Jul 27 2020 04:49:00
%S A033961 1,1,2,2,4,6,11,17,35,57,115,203,412,745,1546,2838,5901,11154,23255,
%T A033961 44263,93169,179214,377441,733151,1547068,3020878,6399874,12543862
%N A033961 Number of different sets ("cut sets") of triangles a regular (n+2)-gon can be dissected into; two triangulations of an (n+2)-gon are equal if all numbers of congruent triangles coincide.
%D A033961 Iuliana Dochkova-Todorova, Computer Methods and New Values for Cut Set Catalan Numbers, ICEST (2012), 206-207.
%D A033961 J. Dochkowa, H. Harborth and I. Mengersen, Cut set Catalan numbers, Congressus Numerantium, Proceedings of the Twenty-ninth Southeastern International Conference on Combinatorics, Graph Theory and Computing (Boca Raton, FL, 1998). Congr. Numer. 130 (1998), 133-139.
%H A033961 Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a033/A033961.java">Java program</a> (github)
%K A033961 nonn,more
%O A033961 2,3
%A A033961 Heiko Harborth (i1031901(AT)ws.rz.tu-bs.de)
%E A033961 a(20)-a(29) from Dochkova-Todorova added by _Sean A. Irvine_, Jul 26 2020