90163722073domain: NAppears in sequences1/3 the number of (n+1) X 3 0..2 arrays with every 2 X 2 subblock having at least two equal elements connected horizontally or vertically.at n=7A1843691/3 the number of (n+1)X9 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.at n=1A184375