A300464 - OEIS

%I #4 Mar 06 2018 11:28:48

%S 0,41,212,2585,55663,935121,17675111,330639367,6123205255,

%T 114735094931,2136975985538,39899944005038,744635053156875,

%U 13895291324256516,259332066899793610,4839626748377777725,90318818165804970003

%N Number of nX7 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A300465.

%H R. H. Hardin, <a href="/A300464/b300464.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300465.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 06 2018