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 A261244 #11 Sep 16 2015 04:54:21 %S A261244 1,1,3,9,58,384 %N A261244 Row sums of A261242: number of connected binary bisymmetric n X n matrices B with B[1,1] = 1 = B[2,2]. %C A261244 For the definition of a connected binary bisymmetric n X n matrix B with the four corners occupied by 1s see the comment under A261242. %Y A261244 Cf. A261242. %K A261244 nonn,more %O A261244 1,3 %A A261244 _Wolfdieter Lang_ and _Kival Ngaokrajang_, Aug 18 2015