A299947 - OEIS

%I #6 Mar 08 2023 12:18:01

%S 64,301,137,952,4924,19269,116051,642696,3313121,19431636,109795406,

%T 592849148,3399315271,19264726916,105918199897,600490288656,

%U 3398611439536,18863937917408,106352314369227,600681055187239

%N Number of n X 7 0..1 arrays with every element equal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A299948.

%H R. H. Hardin, <a href="/A299947/b299947.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..0..1. .0..0..1..0..0..0..1

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

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

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

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

%Y Cf. A299948.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 22 2018