1396736

Appears in sequences

• Number of nonseparable toroidal tree-rooted maps with n + 2 edges and n + 1 vertices.at n=30A006414
• Number of Barlow packings with group P3(bar)m1(O) that repeat after 2n layers.at n=19A011952
• Number of n X 2 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.at n=12A206687
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 107", based on the 5-celled von Neumann neighborhood.at n=22A278901
• a(n) = n^3*sigma_2(n).at n=16A386746