2302950

Appears in sequences

• Number of defective 4-colorings of an n X 1 0..3 array connected horizontally, antidiagonally and vertically with exactly two mistakes, and colors introduced in row-major 0..3 order.at n=13A229665
• Number of multigraphs on 4 unlabeled nodes with n edges where the edges can be of two colors.at n=19A261174