|
%I
%S 8,1933,3820,14888,62390,290466,1276012,5745438,26249179,117931466,
%T 529767543,2397639048,10849215458,49036526523,221822852403,
%U 1003695687810,4540550678347,20545128422585,92986082536821,420869471627171
%N Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
%C Column 7 of A297993.
%H R. H. Hardin, <a href="/A297992/b297992.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..1..0..1..0..0. .0..1..1..0..1..1..1. .0..1..0..0..0..0..0
%e ..0..1..0..0..1..0..1. .0..0..0..0..0..0..1. .1..0..1..1..1..1..0
%e ..0..1..1..1..1..0..1. .1..1..1..1..1..1..0. .1..0..1..0..0..1..0
%e ..1..0..0..0..0..1..0. .0..0..1..0..0..0..1. .0..0..1..0..1..0..0
%e ..0..1..1..1..1..0..0. .0..1..1..1..1..1..1. .0..1..1..0..1..1..1
%Y Cf. A297993.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 10 2018
| 