%I
%S 6706,99630,1520024,23428586,361889580,5604275160,86776363660,
%T 1346057282610,20871073347970,324182229853644,5033011970696922,
%U 78280166521734740,1216896695697878704,18952578238483018624
%N Number of (n+1)X(2+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant stress 1X1 tilings)
%C Column 2 of A234245
%H R. H. Hardin, <a href="/A234242/b234242.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A234242/a234242.txt">Empirical recurrence of order 45</a>
%F Empirical recurrence of order 45 (see link above)
%e Some solutions for n=2
%e ..0..2..1....4..2..1....6..6..7....5..7..2....4..0..4....2..6..2....3..5..4
%e ..0..4..1....2..2..3....6..4..7....2..6..3....7..5..7....1..7..5....3..7..4
%e ..3..5..4....6..4..7....1..1..2....0..2..1....0..0..0....0..4..4....0..6..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 21 2013
