188556domain: NAppears in sequencesNumbers k such that k and k^2 use only the digits 1, 3, 5, 6 and 8.at n=13A137034Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000101 or 00000111.at n=12A261704