%I #4 Feb 15 2016 11:38:51
%S 0,2285,60666,1706732,39670270,911930096,19876401224,426591159751,
%T 8952723005030,185650834624156,3802871585155968,77225962585267472,
%U 1555913690406127580,31149964203775581289,620153220846869863058
%N Number of 7Xn binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.
%C Row 7 of A268886.
%H R. H. Hardin, <a href="/A268892/b268892.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A268892/a268892.txt">Empirical recurrence of order 68</a>
%F Empirical recurrence of order 68 (see link above)
%e Some solutions for n=3
%e ..1..0..0. .0..1..1. .1..0..0. .0..0..1. .0..1..0. .0..0..0. .0..0..1
%e ..0..0..1. .0..0..0. .1..1..0. .1..0..0. .0..1..0. .0..0..1. .1..0..0
%e ..1..0..0. .1..0..1. .0..0..1. .0..0..0. .1..0..1. .1..0..1. .1..0..0
%e ..1..0..0. .1..0..1. .1..0..0. .0..0..0. .1..0..0. .0..0..1. .0..1..0
%e ..0..1..0. .0..0..0. .1..0..1. .0..1..1. .1..0..0. .0..1..0. .0..1..0
%e ..1..0..0. .1..0..1. .0..0..1. .0..0..0. .1..0..1. .0..1..0. .1..0..1
%e ..1..0..0. .0..0..1. .0..0..0. .0..1..0. .0..0..0. .0..0..1. .0..0..0
%Y Cf. A268886.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 15 2016