login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of n X n 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal
0

%I #8 Dec 18 2015 18:18:01

%S 3,81,14974,18584111,151596413811,8153351029428092,

%T 2876868686935789680075,6662940552094334528016043729,

%U 101291421007307048419298014635301970

%N Number of n X n 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

%C Diagonal of A207550

%e Some solutions for n=4

%e ..0..2..0..2....2..0..0..1....0..2..2..0....0..2..2..2....2..2..1..2

%e ..2..2..0..2....1..1..0..1....1..0..0..0....1..1..0..2....2..1..0..0

%e ..2..0..1..0....0..0..1..0....0..2..1..2....0..0..1..0....1..1..1..0

%e ..0..2..1..0....1..1..0..0....0..0..0..0....1..2..0..2....0..1..0..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 18 2012