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 A186125 #7 Jul 22 2025 10:15:38 %S A186125 182,1878,10502,79782,539962,4056794,29491822,220010616,1637583596, %T A186125 12272724126,92041463782,692502277290,5211824476838,39292304082970, %U A186125 296277012735686,2235990214584584,16877344601227160,127445629177320202 %N A186125 Number of (n+1)X7 binary arrays with every 2X2 subblock diagonal sum less antidiagonal sum equal to some horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum. %C A186125 Column 6 of A186128 %H A186125 R. H. Hardin, <a href="/A186125/b186125.txt">Table of n, a(n) for n = 1..200</a> %e A186125 Some solutions for 3X7 %e A186125 ..1..0..1..0..1..1..1....0..1..0..0..1..0..0....1..0..0..1..1..0..0 %e A186125 ..1..1..1..1..1..0..0....1..1..1..0..0..0..0....1..0..0..0..0..0..1 %e A186125 ..0..1..0..1..1..0..0....1..0..1..0..0..1..1....0..0..1..0..0..0..1 %K A186125 nonn %O A186125 1,1 %A A186125 _R. H. Hardin_ Feb 13 2011