1557742domain: NAppears in sequencesNumber of slender perfect graphs on n nodes.at n=9A123454Number of (n+2) X 7 0..3 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..3 introduced in row major order.at n=10A204639