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 A289616 #17 Dec 08 2023 16:26:19
%S A289616 1,1,1,2,11,37,126,422,1422,4853,16786,58775,208000,742887,2674426,
%T A289616 9694830,35357654,129644773,477638682,1767263171,6564120400,
%U A289616 24466266999,91482563618,343059613627,1289904147300,4861946401427,18367353072126,69533550915977,263747951750332,1002242216651339
%N A289616 A246604 (Catalan(n)-n) with initial terms 1,0,0,2,10 changed to 1,1,1,2,11.
%C A289616 Related to number of mesh patterns of length 2 that avoid the pattern 321.
%H A289616 Murray Tannock, <a href="https://skemman.is/bitstream/1946/25589/1/msc-tannock-2016.pdf">Equivalence classes of mesh patterns with a dominating pattern</a>, MSc Thesis, Reykjavik Univ., May 2016. See Appendix B2.
%t A289616 Join[{1,1,1,2,11},Array[CatalanNumber[#]-#&,30,5]] (* _Paolo Xausa_, Dec 08 2023 *)
%Y A289616 A variant of A246604.
%Y A289616 All of A000108, A001453, A246604, A273526, A120304, A289615, A289616, A289652, A289653, A289654 are very similar sequences.
%K A289616 nonn
%O A289616 1,4
%A A289616 _N. J. A. Sloane_, Jul 09 2017