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 A289654 #6 Jul 09 2017 11:03:04 %S A289654 1,1,1,3,13,40,130,427,1428,4860,16794 %N A289654 Related to number of mesh patterns of length 2 that avoid the pattern 321. %H A289654 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. %Y A289654 All of A000108, A001453, A246604, A273526, A120304, A289615, A289616, A289652, A289653, A289654 are very similar sequences. %K A289654 nonn,more %O A289654 1,4 %A A289654 _N. J. A. Sloane_, Jul 09 2017