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 A219426 #6 Jul 23 2025 00:26:52 %S A219426 1,616,9573,230726,4934366,104434119,2222033208,47581843251, %T A219426 1020963792078,21891250379251,469088799364095,10050616587252213, %U A219426 215366263056062190,4615153893061065333,98898611652123318575 %N A219426 Unchanging value maps: number of 6Xn binary arrays indicating the locations of corresponding elements unequal to no horizontal or antidiagonal neighbor in a random 0..2 6Xn array. %C A219426 Row 6 of A219421 %H A219426 R. H. Hardin, <a href="/A219426/b219426.txt">Table of n, a(n) for n = 1..22</a> %e A219426 Some solutions for n=3 %e A219426 ..1..1..1....0..0..1....0..0..0....0..0..1....1..0..0....0..0..1....1..0..0 %e A219426 ..1..1..1....1..0..1....0..0..1....0..0..0....0..1..1....1..0..0....0..1..0 %e A219426 ..1..0..0....0..0..1....0..0..1....1..0..0....1..0..0....0..0..0....0..0..1 %e A219426 ..1..0..0....1..0..0....1..1..1....0..0..1....0..0..0....0..0..0....1..0..0 %e A219426 ..0..0..0....0..0..0....1..0..0....1..1..1....1..0..1....0..0..0....0..1..0 %e A219426 ..0..1..1....1..0..1....1..0..1....1..0..0....1..0..0....0..1..1....0..0..1 %K A219426 nonn %O A219426 1,2 %A A219426 _R. H. Hardin_ Nov 19 2012