1073774591

Appears in sequences

• Number of reversible string structures with n beads using exactly two different colors.at n=31A056326
• a(n) = 4^n + 2^n - 1.at n=15A099393
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 779", based on the 5-celled von Neumann neighborhood.at n=30A290297