Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #3 Jan 25 2017 10:44:14
%S 365,52193,736757,32354824,1421127262,56764280423,2352459742664,
%T 97337283237331,4014393674152359
%N Number of 7Xn 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
%C Row 7 of A281605.
%e Some solutions for n=2
%e ..0..1. .0..0. .0..0. .0..1. .0..1. .0..1. .0..0. .0..1. .0..1. .0..1
%e ..0..1. .1..2. .1..1. .2..0. .0..2. .0..2. .1..1. .2..1. .2..1. .2..1
%e ..2..0. .0..1. .0..0. .1..2. .0..1. .0..2. .2..2. .1..0. .2..0. .2..0
%e ..1..2. .2..0. .2..1. .1..2. .2..1. .0..2. .0..0. .2..0. .2..1. .0..1
%e ..1..0. .2..0. .2..0. .2..1. .2..0. .1..0. .1..2. .0..2. .1..0. .2..1
%e ..2..0. .0..1. .1..0. .2..1. .0..1. .1..0. .1..0. .0..2. .1..2. .0..2
%e ..1..0. .0..2. .0..1. .2..0. .0..1. .2..2. .1..2. .0..2. .2..0. .0..1
%Y Cf. A281605.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 25 2017