4615215875domain: NAppears in sequences1/128 the number of (n+2)X5 binary arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace.at n=7A1859871/128 the number of (n+2)X10 binary arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace.at n=2A185992