A274754 - OEIS

%I #4 Jul 04 2016 10:29:13

%S 32,729,10946,185435,3140840,53680592,920432562,15806543610,

%T 271711836855,4671914239590,80354505513874,1382068876451987,

%U 23773417216542030,408926400535170333,7034177852486985161,120997474917708497554

%N Number of 7Xn 0..2 arrays with no element equal to any value at offset (-1,-2) (0,-1) or (-1,0) and new values introduced in order 0..2.

%C Row 7 of A274749.

%H R. H. Hardin, <a href="/A274754/b274754.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A274754/a274754.txt">Empirical recurrence of order 80</a>

%F Empirical recurrence of order 80 (see link above)

%e Some solutions for n=4

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

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

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

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

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

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

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

%Y Cf. A274749.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 04 2016