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 A218056 #6 Jul 22 2025 23:47:07 %S A218056 4,4,4,16,4,16,36,16,16,36,94,36,256,36,94,236,94,1296,1296,94,236, %T A218056 602,236,8836,9792,8836,236,602,1528,602,55696,114886,114886,55696, %U A218056 602,1528,3882,1528,362404,1171452,2585920,1171452,362404,1528,3882,9858,3882 %N A218056 T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random 0..3 nXk array. %C A218056 Table starts %C A218056 .....4.....4.........16............36..............94..............236 %C A218056 .....4.....4.........16............36..............94..............236 %C A218056 ....16....16........256..........1296............8836............55696 %C A218056 ....36....36.......1296..........9792..........114886..........1171452 %C A218056 ....94....94.......8836........114886.........2585920.........49284832 %C A218056 ...236...236......55696.......1171452........49284832.......1673074136 %C A218056 ...602...602.....362404......12670594......1007805010......62191743600 %C A218056 ..1528..1528....2334784.....134406796.....20132968950....2242118119704 %C A218056 ..3882..3882...15069924....1433633158....404539599336...81495204878500 %C A218056 ..9858..9858...97180164...15254842534...8108559847952.2952333174631968 %C A218056 .25038.25038..626901444..162467654898.162698302825806 %C A218056 .63592.63592.4043942464.1729976648128 %H A218056 R. H. Hardin, <a href="/A218056/b218056.txt">Table of n, a(n) for n = 1..127</a> %e A218056 Some solutions for n=3 k=4 %e A218056 ..3..1..1..1....0..0..1..1....0..0..0..2....1..1..2..2....1..1..2..3 %e A218056 ..0..0..1..1....0..0..1..1....0..0..0..1....1..1..1..2....1..1..1..2 %e A218056 ..0..0..3..3....3..2..2..2....3..1..1..1....1..1..1..3....1..1..1..2 %Y A218056 Column 3 is A207947(n-1) %K A218056 nonn,tabl %O A218056 1,1 %A A218056 _R. H. Hardin_ Oct 19 2012