4439449domain: NAppears in sequencesSquares composed of digits {3,4,9}.at n=4A0539431/8 of the number of 8-colorings of an n X n array symmetric about both diagonal and antidiagonal.at n=4A145252Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=25A207364