67108608

Appears in sequences

• Number of 2n-bead balanced binary necklaces of fundamental period 2n, equivalent to reversed complement; also Dirichlet convolution of b_n=2^(n-1) with mu(n); also number of components of Mandelbrot set corresponding to Julia sets with an attractive n-cycle.at n=26A000740
• Number of Barlow packings with group P63/mmc(S) that repeat after 4n layers.at n=26A011946
• Number of primitive (aperiodic) word structures of length n which contain exactly two different symbols.at n=26A056278
• List of codewords in binary lexicode with Hamming distance 17 written as decimal numbers.at n=3A075967
• a(n) = 10*a(n-1) - 16*a(n-2), with a(0) = 0 and a(1) = 3.at n=9A120689
• If an array is made of columns of -nacci sequences, fibo-, tribo- etc. all starting w. 1,1,2 etc, the NW to SE diagonals can be extended by computation. The above is diagonal 9. See A159741 for details.at n=18A159746
• Duplicate of A011946.at n=26A195095
• Decimal representation of the diagonal from the corner 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=25A289939
• a(n) = A269795(n)/2.at n=26A365162