268435454

Appears in sequences

• a(n) = 2^n - 2.at n=28A000918
• Numerator of the expected time to finish a random Tower of Hanoi problem with n disks using optimal moves.at n=27A060590
• Expansion of (1-x+2x^2)/((1-x)*(1-2x)).at n=27A095121
• Number of palindromes (in base 8) below 8^n.at n=17A117867
• a(0) = 1, a(n) = (-1)^n*(2-2^(n-1)) for n>0.at n=29A122959
• Row sums of triangle A134066.at n=26A134067
• a(n) = a(n-1) + 2a(n-2).at n=28A135440
• a(2*n) = 2*(2*4^(n-1)-1) and a(2*n-1) = 2*4^(n-1)-1.at n=28A140253
• Number of length n+2 0..1 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.at n=26A250554
• 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=27A277215
• 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 261", based on the 5-celled von Neumann neighborhood.at n=27A280412
• Reduced denominators of f(n) = (n+1)/(2^(2+n)-2) with A026741(n+1) as numerators.at n=26A281500
• 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 413", based on the 5-celled von Neumann neighborhood.at n=27A282004
• 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 429", based on the 5-celled von Neumann neighborhood.at n=27A282119
• 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 493", based on the 5-celled von Neumann neighborhood.at n=27A282658
• 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=28A283349
• 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 617", based on the 5-celled von Neumann neighborhood.at n=28A283350
• 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 619", based on the 5-celled von Neumann neighborhood.at n=27A283353
• 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 657", based on the 5-celled von Neumann neighborhood.at n=27A283591
• 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 721", based on the 5-celled von Neumann neighborhood.at n=27A283709