3727073domain: NAppears in sequences1/6 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last.at n=7A1844731/6 the number of (n+2)X10 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last.at n=4A184476