1207959550

Appears in sequences

• Number of palindromes (in base 8) below 8^n.at n=18A117867
• a(n) = 9*2^n - 2.at n=27A176449
• 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 621", based on the 5-celled von Neumann neighborhood.at n=30A283357