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Number of horizontal and antidiagonal neighbor colorings of the odd squares of an n X n array with new integer colors introduced in row major order
0

%I #5 Dec 18 2015 18:18:13

%S 1,1,5,602,373780,33093252880,14216413305846436,

%T 2562708724272040433794232,2209363619821632289359062591728192

%N Number of horizontal and antidiagonal neighbor colorings of the odd squares of an n X n array with new integer colors introduced in row major order

%C Diagonal of A216084

%e Some solutions for n=4

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

%e ..2..x..3..x....2..x..3..x....2..x..3..x....2..x..0..x....2..x..3..x

%e ..x..4..x..3....x..2..x..4....x..2..x..3....x..3..x..4....x..1..x..3

%e ..3..x..4..x....0..x..2..x....0..x..2..x....5..x..3..x....3..x..4..x

%K nonn

%O 1,3

%A _R. H. Hardin_ Sep 01 2012