A304603 - OEIS

%I #6 May 11 2023 13:22:35

%S 64,101,330,1450,5205,19634,75463,317420,1356754,5638479,22732759,

%T 91350019,373633293,1543605001,6356149925,25997316856,106077943180,

%U 433845348217,1778745827391,7294395546482,29879499739692,122299513350861

%N Number of n X 7 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero.

%C Column 7 of A304604.

%H R. H. Hardin, <a href="/A304603/b304603.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A304604.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 15 2018