cp's OEIS Frontend

A268797 Number of nX7 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.

%I A268797 #4 Feb 13 2016 13:45:04
%S A268797 576,4360,41248,561116,7801688,104971262,1384570516,17967375416,
%T A268797 230262982692,2921020155826,36745483472428,459003330021886,
%U A268797 5699362152372404,70403795917829390,865796392149477244
%N A268797 Number of nX7 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.
%C A268797 Column 7 of A268798.
%H A268797 R. H. Hardin, <a href="/A268797/b268797.txt">Table of n, a(n) for n = 1..210</a>
%H A268797 R. H. Hardin, <a href="/A268797/a268797.txt">Empirical recurrence of order 68</a>
%F A268797 Empirical recurrence of order 68 (see link above)
%e A268797 Some solutions for n=3
%e A268797 ..2..2..1..2..2..2..2. .1..2..2..2..2..1..2. .2..2..2..1..1..2..2
%e A268797 ..1..2..2..2..1..2..1. .2..1..2..2..2..2..2. .1..2..2..2..2..2..2
%e A268797 ..2..1..2..1..2..2..2. .1..2..2..2..1..2..2. .2..1..2..2..2..1..2
%Y A268797 Cf. A268798.
%K A268797 nonn
%O A268797 1,1
%A A268797 _R. H. Hardin_, Feb 13 2016