A302169 - OEIS

%I #4 Apr 02 2018 14:53:55

%S 64,86,111,361,621,1563,2853,7306,12963,33522,61775,157788,293072,

%T 746806,1414502,3560709,6821117,17041351,33109869,81878009,160823108,

%U 394307941,783258522,1903510955,3817195020,9202579162,18623741941,44557228577

%N Number of 7Xn 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Row 7 of A302163.

%H R. H. Hardin, <a href="/A302169/b302169.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A302169/a302169.txt">Empirical recurrence of order 80</a>

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

%e Some solutions for n=5

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

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

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

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

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

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

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

%Y Cf. A302163.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 02 2018