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 A219307 #6 Jul 23 2025 00:22:00 %S A219307 12,142,1958,25647,326444,4215579,54797587,710493819,9194088812, %T A219307 119051026450,1542298398563,19977719144984,258742519096389, %U A219307 3351214351286909,43406104354037517,562207779495312746 %N A219307 Unchanging value maps: number of nX5 binary arrays indicating the locations of corresponding elements unequal to no horizontal or vertical neighbor in a random 0..2 nX5 array. %C A219307 Column 5 of A219310 %H A219307 R. H. Hardin, <a href="/A219307/b219307.txt">Table of n, a(n) for n = 1..40</a> %e A219307 Some solutions for n=3 %e A219307 ..0..1..0..0..0....0..0..0..1..0....1..1..1..1..1....0..0..1..0..1 %e A219307 ..0..0..1..0..1....0..0..1..0..0....1..0..1..0..1....0..0..0..0..0 %e A219307 ..0..1..1..1..1....0..1..0..0..0....0..0..0..0..0....0..0..0..0..0 %K A219307 nonn %O A219307 1,1 %A A219307 _R. H. Hardin_ Nov 17 2012