298564

Appears in sequences

• a(1) = 0, a(2) = 1, a(3) = 1, a(4) = 7; thereafter, a(n) = a(n-1) + (n-1)*a(n-2).at n=12A086828
• 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 595", based on the 5-celled von Neumann neighborhood.at n=18A283213