A298886 - OEIS

%I #4 Jan 28 2018 08:46:24

%S 5,49,34,141,243,516,814,1646,3312,6565,13040,25941,51679,103895,

%T 205265,411011,821599,1643914,3279755,6573928,13136700,26293574,

%U 52604464,105288984,210671989,421821199,844171966,1689881070,3382803573

%N Number of nX6 0..1 arrays with every element equal to 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

%C Column 6 of A298888.

%H R. H. Hardin, <a href="/A298886/b298886.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=7

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

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

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

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

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

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

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

%Y Cf. A298888.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 28 2018