A298138 - OEIS

%I #4 Jan 13 2018 11:14:30

%S 0,34,6,185,627,3417,14422,73961,354200,1772595,8807624,44087860,

%T 218942205,1093100404,5447861031,27173970577,135547796845,

%U 676389434363,3374295032672,16836823878509,84007635799139,419167042007303

%N Number of nX7 0..1 arrays with every element equal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

%C Column 7 of A298139.

%H R. H. Hardin, <a href="/A298138/b298138.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=7

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

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

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

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

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

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

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

%Y Cf. A298139.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 13 2018