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 A265922 #4 Dec 18 2015 22:32:26 %S A265922 25,340,4616,62696,851496,11564952,157071768,2133318088,28974227016, %T A265922 393521606584,5344722135352,72590826767208,985912408928360, %U A265922 13390442524046040,181866003973693912,2470063509346243592 %N A265922 Number of nX2 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique. %C A265922 Column 2 of A265928. %H A265922 R. H. Hardin, <a href="/A265922/b265922.txt">Table of n, a(n) for n = 1..210</a> %F A265922 Empirical: a(n) = 5*a(n-1) +110*a(n-2) +186*a(n-3) -1189*a(n-4) -2127*a(n-5) +4920*a(n-6) +5776*a(n-7) -9216*a(n-8) %e A265922 Some solutions for n=4 %e A265922 ..3..4....2..4....1..3....2..0....2..1....0..2....0..3....4..4....1..1....2..2 %e A265922 ..1..0....3..3....2..4....1..1....3..0....1..4....4..0....2..2....2..0....3..1 %e A265922 ..3..2....1..1....3..1....3..2....1..3....3..1....2..2....4..4....0..2....2..0 %e A265922 ..4..1....2..4....0..0....4..0....4..0....0..4....4..3....3..1....1..1....0..1 %Y A265922 Cf. A265928. %K A265922 nonn %O A265922 1,1 %A A265922 _R. H. Hardin_, Dec 18 2015