88860domain: NAppears in sequencesConvolution of A000203 with itself.at n=56A000385Numbers k such that k and k^2 use only the digits 0, 6, 7, 8 and 9.at n=8A136966Number of nX6 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to itself.at n=9A195967