A210834 Number of (n+1) X (n+1) 0..3 symmetric matrices with every 2 X 2 subblock having one, two or four distinct values, and new values 0..3 introduced in lower triangle row major order.

4, 51, 1675, 125483, 20178747, 6756016331, 4647730539387, 6537458079419739, 18773661532321526331, 110047493954215211056859