A300887 - OEIS

%I #4 Mar 14 2018 07:28:56

%S 21,11,148,1822,31867,437276,6236246,88486037,1253495751,17820280071,

%T 252432128095,3581335862055,50810347370710,720844568426583,

%U 10226876364949089,145096143960674291,2058575118040453456

%N Number of nX7 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A300888.

%H R. H. Hardin, <a href="/A300887/b300887.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300888.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 14 2018