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 A181244 #5 Jul 22 2025 08:38:50 %S A181244 512,102010,22512862,4914052362,1074033301458,234710735573170, %T A181244 51292751478532550,11209291140160525086,2449629600675855540670, %U A181244 535331352762077895206878,116988976006831708160421286 %N A181244 Number of nX9 binary matrices with no 2X2 circuit having pattern 0101 in any orientation. %C A181244 Column 9 of A181245 %H A181244 R. H. Hardin, <a href="/A181244/b181244.txt">Table of n, a(n) for n=1..200</a> %K A181244 nonn %O A181244 1,1 %A A181244 _R. H. Hardin_ Oct 10 2010