A298840 - OEIS

%I #4 Jan 27 2018 07:49:09

%S 0,104,2440,60497,3570731,160441457,7844725524,380985444657,

%T 18510417612668,902275957883352,43936865148320525,2140933146128529606,

%U 104313951368150470461,5082784700709399173199,247666770498486555848961

%N Number of nX7 0..1 arrays with every element equal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A298841.

%H R. H. Hardin, <a href="/A298840/b298840.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A298841.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 27 2018