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 #6 Jun 15 2020 11:20:25
%S 1,1,9,4,65,1112,26343,3833927,1239155011,967049306590
%N Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298589.
%e Some solutions for n=5
%e ..0..1..1..1..1. .0..0..1..1..0. .0..0..1..1..1. .0..0..0..0..1
%e ..1..1..0..1..1. .0..0..1..1..1. .0..0..1..1..1. .0..0..1..0..0
%e ..1..0..0..0..1. .1..0..1..1..1. .1..1..0..0..0. .0..1..1..1..0
%e ..1..1..0..1..1. .0..0..0..0..0. .1..1..0..0..0. .0..0..1..0..0
%e ..0..1..1..1..0. .0..0..1..0..0. .1..1..0..0..1. .0..0..0..0..1
%Y Cf. A298589.
%K nonn
%O 1,3
%A _R. H. Hardin_, Jan 22 2018