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 A255743 a(1) = 1; for n > 1, a(n) = 9*8^{A000120(n-1)-1}. 5
 1, 9, 9, 72, 9, 72, 72, 576, 9, 72, 72, 576, 72, 576, 576, 4608, 9, 72, 72, 576, 72, 576, 576, 4608, 72, 576, 576, 4608, 576, 4608, 4608, 36864, 9, 72, 72, 576, 72, 576, 576, 4608, 72, 576, 576, 4608, 576, 4608, 4608, 36864, 72, 576, 576, 4608, 576, 4608, 4608 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Also, this is a row of the square array A255740. Partial sums give A255764. LINKS Felix FrÃ¶hlich, Table of n, a(n) for n = 1..10000 EXAMPLE Also, written as an irregular triangle in which the row lengths are the terms of A011782, the sequence begins: 1; 9; 9, 72; 9, 72, 72, 576; 9, 72, 72, 576, 72, 576, 576, 4608; ... PROG (PARI) a(n) = if (n==1, 1, 9*8^(hammingweight(n-1)-1)); \\ Michel Marcus, Mar 15 2015 CROSSREFS Cf. A000120, A151787, A147582, A151789, A151779, A151791, A151782, A255740, A255741, A255744, A255745, A255764. Sequence in context: A241868 A243125 A270008 * A183893 A210052 A239225 Adjacent sequences:  A255740 A255741 A255742 * A255744 A255745 A255746 KEYWORD nonn AUTHOR Omar E. Pol, Mar 05 2015 EXTENSIONS More terms from Michel Marcus, Mar 15 2015 STATUS approved

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Last modified January 22 07:47 EST 2021. Contains 340360 sequences. (Running on oeis4.)