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 A218519 #6 Jul 22 2025 23:57:33 %S A218519 94,7902,639228,49466988,3856183182,300890728324,23498366579584, %T A218519 1835588124922808,143401026618956100,11203192491897097878, %U A218519 875256805363669114070,68380229008811109398218,5342272688474066298382144 %N A218519 Number of nX5 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..3 nX5 array. %C A218519 Column 5 of A218522 %H A218519 R. H. Hardin, <a href="/A218519/b218519.txt">Table of n, a(n) for n = 1..42</a> %e A218519 Some solutions for n=3 %e A218519 ..0..0..2..1..1....0..0..1..2..3....0..0..3..2..2....0..0..1..2..2 %e A218519 ..0..0..3..1..1....0..0..1..3..3....2..1..3..1..1....0..0..1..0..0 %e A218519 ..3..3..3..1..3....1..1..2..2..2....1..1..1..1..2....0..0..3..0..2 %K A218519 nonn %O A218519 1,1 %A A218519 _R. H. Hardin_ Oct 31 2012