A306142 - OEIS

%I #4 Jun 22 2018 07:56:31

%S 8,4184,79839,2880944,114440831,3871080422,138192505287,4979043059695,

%T 176429151145679,6292688444495891,224492394855179697,

%U 7996800997805828281,285059535256378607710,10161092061905988608588,362149341462830459252149

%N Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Column 7 of A306143.

%H R. H. Hardin, <a href="/A306142/b306142.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A306143.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 22 2018