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 A231838 #6 Jul 23 2025 06:43:15 %S A231838 1268,64607,114873933,150624159314,220309043506362,324616806882571299, %T A231838 474822731471136470440,695244971516001773033192, %U A231838 1018294151929133028079374411,1491192875210978136830040921123 %N A231838 Number of nX7 0..3 arrays with no element less than a strict majority of its horizontal and antidiagonal neighbors. %C A231838 Column 7 of A231839 %H A231838 R. H. Hardin, <a href="/A231838/b231838.txt">Table of n, a(n) for n = 1..210</a> %e A231838 Some solutions for n=2 %e A231838 ..3..0..0..0..0..0..0....3..2..0..0..0..0..1....0..0..0..0..3..0..0 %e A231838 ..0..0..2..1..0..0..0....1..0..0..0..0..1..3....3..3..0..0..0..0..3 %K A231838 nonn %O A231838 1,1 %A A231838 _R. H. Hardin_, Nov 14 2013