1119511003domain: NAppears in sequences1/4 the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having at least two equal elements connected horizontally or vertically.at n=7A1841451/4 the number of (n+1)X9 0..3 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.at n=0A184152