login
Number of nX7 0..1 arrays with every element equal to 0, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
1

%I #4 Jan 22 2018 06:16:41

%S 1,100,12,70,1055,604,2888,28278,43961,164865,1297974,3202666,

%T 11272019,75646978,235917037,836719290,4928659404,17526001960,

%U 63801490008,339718940939,1304647958959,4885784115965,24153867743517,97062560996428

%N Number of nX7 0..1 arrays with every element equal to 0, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

%C Column 7 of A298575.

%H R. H. Hardin, <a href="/A298574/b298574.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298575.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 22 2018