72876032

Appears in sequences

• Expansion of ((1-x)*(3*x^2-3*x+1))/(1-2*x)^3.at n=21A190050
• Number of defective 4-colorings of an n X 2 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..3 order.at n=20A229572