275940domain: NAppears in sequencesa(n) = n*(n+1)*(n^2+1)/2.at n=27A071237Number of defective 4-colorings of an n X 7 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..3 order.at n=12A229577