94469domain: NAppears in sequences1/8 the number of (n+1)X5 0..3 arrays with all 2X2 subblock sums the same.at n=6A1840241/8 the number of (n+1)X8 0..3 arrays with all 2X2 subblock sums the same.at n=3A184027Semiprimes with only semiprime digits, each appearing at least once.at n=40A349275