A300376 - OEIS

%I #4 Mar 04 2018 09:17:26

%S 1,10,11,26,80,237,692,2548,8240,26808,92281,309903,1039489,3527966,

%T 11931702,40287280,136366907,461541474,1560895810,5282067585,

%U 17874953308,60478794740,204650044415,692516520567,2343315563850,7929361264807

%N Number of nX4 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 4 of A300380.

%H R. H. Hardin, <a href="/A300376/b300376.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A300376/a300376.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..0..0. .0..0..0..0. .0..1..0..0. .0..1..1..0

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

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

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

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

%Y Cf. A300380.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 04 2018