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