The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #4 Jun 07 2018 08:57:31
%S 1,4,29,334,8734,385282,42274045,12972861669,10445509134407
%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
%C Diagonal of A305642.
%e Some solutions for n=5
%e ..0..0..1..1..0. .0..0..1..1..1. .0..0..1..1..1. .0..1..1..0..0
%e ..0..0..1..1..0. .0..1..0..1..1. .0..0..1..1..0. .0..0..0..0..0
%e ..1..0..1..0..0. .0..1..0..0..0. .1..1..1..1..1. .0..0..0..0..1
%e ..1..0..1..0..0. .1..1..0..1..1. .1..1..1..1..0. .1..0..0..0..1
%e ..1..1..0..0..0. .1..1..0..1..1. .1..0..0..1..1. .1..0..0..0..0
%Y Cf. A305642.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jun 07 2018