10825650

Appears in sequences

• Number of defective 3-colorings of an n X 2 0..2 array connected horizontally and vertically with exactly two mistakes, and colors introduced in row-major 0..2 order.at n=11A229600
• Sheffer triangle (exp(x), exp(3*x) - 1). Named S2[3,1].at n=52A282629