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 A217968 #8 Jul 22 2025 23:45:12 %S A217968 243,1523,72257,1602741,48942485,1368783313,40300213599,1170265289539, %T A217968 34202123230555,997730409895429,29128167430767449,850254151548959837, %U A217968 24820794901995097417,724574515854245379961,21151965211624408172993 %N A217968 Number of 5Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..2 5Xn array. %C A217968 Row 5 of A217964 %H A217968 R. H. Hardin, <a href="/A217968/b217968.txt">Table of n, a(n) for n = 1..24</a> %e A217968 Some solutions for n=3 %e A217968 ..2..0..0....0..0..0....1..1..1....0..0..1....1..1..1....1..1..1....2..2..1 %e A217968 ..1..0..0....0..0..0....2..0..2....0..0..0....2..0..0....1..0..0....1..1..0 %e A217968 ..1..0..1....2..0..1....0..0..2....0..0..0....1..0..0....1..0..2....0..0..0 %e A217968 ..1..0..0....1..0..2....2..0..0....2..0..1....0..0..1....0..0..0....0..0..1 %e A217968 ..0..0..2....0..0..1....0..0..2....0..0..0....2..1..2....0..0..0....2..0..0 %K A217968 nonn %O A217968 1,1 %A A217968 _R. H. Hardin_ Oct 16 2012