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 A221037 #6 Jul 23 2025 01:38:56 %S A221037 1,21,228,1733,14277,110506,870027,6717882,52248430,404872294, %T A221037 3137029417,24306328888,188293396538,1458607561162,11298886140485, %U A221037 87523428512115,677973532822056,5251692364017630,40680417109724197,315116602409454269 %N A221037 Majority value maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..2 3Xn array. %C A221037 Row 3 of A221035 %H A221037 R. H. Hardin, <a href="/A221037/b221037.txt">Table of n, a(n) for n = 1..210</a> %e A221037 Some solutions for n=3 %e A221037 ..1..1..1....1..1..1....1..0..1....0..0..0....0..0..1....1..0..0....1..1..1 %e A221037 ..0..1..1....0..0..0....0..0..1....0..1..1....1..1..1....1..1..1....0..0..0 %e A221037 ..1..0..1....1..1..1....1..1..1....1..1..0....0..0..1....0..1..1....0..0..0 %K A221037 nonn %O A221037 1,2 %A A221037 _R. H. Hardin_ Dec 29 2012