A269058 - OEIS

%I #4 Feb 18 2016 11:43:27

%S 2187,29646,464250,9779808,187575858,3726221592,71430596250,

%T 1369456711662,25864594357554,485843586726426,9051481373536698,

%U 167744789740348134,3091817487227619306,56742145362259364580

%N Number of 7Xn 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

%C Row 7 of A269052.

%H R. H. Hardin, <a href="/A269058/b269058.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A269058/a269058.txt">Empirical recurrence of order 92</a>

%F Empirical recurrence of order 92 (see link above)

%e Some solutions for n=2

%e ..2..1. .0..0. .2..2. .2..2. .2..1. .2..2. .2..1. .2..1. .1..2. .2..2

%e ..0..1. .0..1. .2..2. .1..0. .0..1. .1..2. .0..1. .0..1. .2..2. .1..2

%e ..2..1. .0..0. .1..1. .1..0. .0..1. .2..2. .0..1. .2..1. .1..2. .2..2

%e ..2..1. .1..0. .2..2. .1..0. .0..1. .1..2. .0..1. .2..1. .1..2. .2..2

%e ..0..0. .1..0. .1..2. .1..2. .0..0. .2..2. .0..0. .0..0. .2..1. .1..2

%e ..1..0. .2..2. .1..0. .1..2. .0..0. .2..1. .2..1. .1..0. .0..1. .2..2

%e ..1..0. .1..2. .1..2. .1..0. .0..0. .0..1. .0..1. .0..0. .0..1. .2..1

%Y Cf. A269052.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 18 2016