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 A265972 #4 Dec 19 2015 09:47:14 %S A265972 17012,953072,1282192,2263704,5120120,13435392,34825856,92019824, %T A265972 231761056,593080872,1481688160,3832636952,9840184608,25358167888, %U A265972 64217497384,165719314208,425547780616,1093883487608,2780744054920 %N A265972 Number of nX7 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique. %C A265972 Column 7 of A265973. %H A265972 R. H. Hardin, <a href="/A265972/b265972.txt">Table of n, a(n) for n = 1..160</a> %e A265972 Some solutions for n=1 %e A265972 ..3..3..1..2..2..3..1....0..4..1..0..0..4..4....0..2..2..0..3..3..4 %Y A265972 Cf. A265973. %K A265972 nonn %O A265972 1,1 %A A265972 _R. H. Hardin_, Dec 19 2015