6471298096domain: NAppears in sequences1/24 the number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock containing exactly three distinct values.at n=6A1835871/24 of the number of (n+1) X 8 0..3 arrays with every 2 X 2 subblock containing exactly three distinct values.at n=1A183592