A229471 - OEIS

A229471

Number of defective 4-colorings of an n X n 0..3 array connected horizontally, antidiagonally and vertically with exactly one mistake, and colors introduced in row-major 0..3 order.

%I #9 Apr 27 2021 21:35:00

%S 0,6,420,36116,5068384,1317269920,670127758336,686446917153024,

%T 1439114626511742976,6238265946576239106048

%N Number of defective 4-colorings of an n X n 0..3 array connected horizontally, antidiagonally and vertically with exactly one mistake, and colors introduced in row-major 0..3 order.

%C Diagonal of A229479.

%e Some solutions for n=4:

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

%e 2 3 1 3 2 3 1 2 3 0 3 1 2 3 1 2 2 0 1 0

%e 1 3 0 1 1 0 3 0 1 2 0 2 1 2 0 1 3 2 3 1

%e 0 2 3 0 2 1 0 2 0 1 3 0 0 1 0 2 0 1 0 3

%Y Cf. A229479.

%K nonn

%O 1,2

%A _R. H. Hardin_, Sep 24 2013