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 A265970 #4 Dec 19 2015 09:45:51 %S A265970 1252,38096,89776,230784,631264,1820904,5120120,14529352,40869008, %T A265970 116148576,330124104,935364856,2641623616,7497789512,21321031376, %U A265970 60505118208,171246024504,485965902816,1381610459280,3923852199568 %N A265970 Number of nX5 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique. %C A265970 Column 5 of A265973. %H A265970 R. H. Hardin, <a href="/A265970/b265970.txt">Table of n, a(n) for n = 1..210</a> %e A265970 Some solutions for n=3 %e A265970 ..1..4..4..3..0....2..0..4..4..3....0..4..3..0..1....0..1..4..3..3 %e A265970 ..3..0..0..3..1....3..0..1..1..0....3..1..1..4..3....0..3..4..0..1 %e A265970 ..3..1..1..4..4....1..4..3..3..0....3..0..2..2..3....2..3..1..0..4 %Y A265970 Cf. A265973. %K A265970 nonn %O A265970 1,1 %A A265970 _R. H. Hardin_, Dec 19 2015