33554430

Appears in sequences

• a(n) = 2^n - 2.at n=25A000918
• a(n) = 2^(2*n+1) - 2.at n=12A002446
• Number of Barlow packings with group P63/mmc(S) that repeat after 4n layers.at n=25A011946
• a(n) = 2*a(n-1) if n odd else 2*a(n-1) + 6.at n=23A014131
• Number of ways of 3-coloring an annulus consisting of n zones joined like a pearl necklace.at n=24A092297
• Expansion of (1-x+2x^2)/((1-x)*(1-2x)).at n=24A095121
• a(n) = 2^n+(-1)^n-1.at n=25A099430
• A Horadam-Jacobsthal sequence.at n=24A101622
• Number of palindromes (in base 4) below 4^n.at n=23A117863
• Number of palindromes (in base 8) below 8^n.at n=15A117867
• Partial sums of A130752.at n=23A130869
• Row sums of triangle A134066.at n=23A134067
• a(n) = 2^n - (3-(-1)^n)/2.at n=25A141023
• a(n) = A000079(n) - A153130(n).at n=25A153237
• Numerator of Euler(n,3).at n=24A157805
• Duplicate of A011946.at n=25A195095
• Decimal representation of the n-th iteration of the "Rule 229" elementary cellular automaton starting with a single ON (black) cell.at n=12A267851
• a(n) is the smallest even number not congruent to 1 modulo 3 that starts a (2n+1)-element alternating sequence of x/2 and (3x+1) iterations ending in the maximum of its Collatz trajectory.at n=24A277215
• 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 617", based on the 5-celled von Neumann neighborhood.at n=27A283349
• 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 633", based on the 5-celled von Neumann neighborhood.at n=24A283403