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 A220764 #6 Jul 23 2025 01:27:38 %S A220764 256,956,68212,548130,21154028,252705768,7140289348,106444390252, %T A220764 2538132156370,42707545977344,928959886709234,16705185128697224, %U A220764 345677236914253406,6446898251377310532,129826343410954387220 %N A220764 Number of 4Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random 0..3 4Xn array. %C A220764 Row 4 of A220761 %H A220764 R. H. Hardin, <a href="/A220764/b220764.txt">Table of n, a(n) for n = 1..84</a> %e A220764 Some solutions for n=3 %e A220764 ..1..0..0....2..1..3....3..0..0....2..0..2....0..0..2....1..0..3....1..1..1 %e A220764 ..2..0..3....1..0..2....0..0..0....3..0..0....1..0..1....0..0..0....1..0..2 %e A220764 ..0..0..0....0..0..0....0..0..3....2..0..2....3..1..3....0..0..2....0..0..1 %e A220764 ..0..0..1....2..0..1....1..0..2....1..1..1....2..1..1....2..0..3....1..0..0 %K A220764 nonn %O A220764 1,1 %A A220764 _R. H. Hardin_ Dec 19 2012