A297822 - OEIS

%I #4 Jan 06 2018 10:58:27

%S 8,1933,3124,13417,43931,146530,467104,1485611,4742326,15121792,

%T 48148189,153781266,492324793,1577859150,5058924132,16225860490,

%U 52059118956,167096376917,536508689557,1723053505342,5534994384618,17783715046733

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

%C Column 7 of A297823.

%H R. H. Hardin, <a href="/A297822/b297822.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=6

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

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

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

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

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

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

%Y Cf. A297823.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 06 2018