68224

Appears in sequences

• a(n) = 2*a(n-1) + 4*a(n-2) - 4*a(n-3) - 4*a(n-4).at n=12A099176
• Expansion of (1-4*x)/(1-6*x-12*x^2+8*x^3).at n=6A108476
• Number of (n+1) X (1+1) arrays of permutations of 0..n*2+1 filled by rows with each element moved a city block distance of 0 or 2, and rows and columns in increasing lexicographic order.at n=10A263598
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 54", based on the 5-celled von Neumann neighborhood.at n=16A278600
• a(n) is the least number that has exactly n divisors and the differences between its consecutive divisors (ordered by size) are distinct.at n=31A384097