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 A218648 #6 Jul 23 2025 00:02:34 %S A218648 94,1280,44712,1374954,45453172,1519211492,50119569324,1664686049742, %T A218648 55271550032162,1834389849757758,60908824469453990, %U A218648 2022184882918753962,67138807540703516826,2229116172523577249680,74009789156374427379680 %N A218648 Number of nX5 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..3 nX5 array. %C A218648 Column 5 of A218651 %H A218648 R. H. Hardin, <a href="/A218648/b218648.txt">Table of n, a(n) for n = 1..207</a> %e A218648 Some solutions for n=3 %e A218648 ..1..1..1..1..2....2..2..1..1..0....0..0..0..1..1....1..1..1..1..1 %e A218648 ..1..1..1..2..3....2..2..1..0..0....0..0..3..0..0....1..1..0..0..3 %e A218648 ..3..2..2..3..3....2..1..1..0..0....1..2..0..0..0....1..0..0..0..3 %K A218648 nonn %O A218648 1,1 %A A218648 _R. H. Hardin_ Nov 03 2012