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A151785 a(n) = 7^(wt(n) - 1) where wt(n) is the binary weight of n (A000120). 6
1, 1, 7, 1, 7, 7, 49, 1, 7, 7, 49, 7, 49, 49, 343, 1, 7, 7, 49, 7, 49, 49, 343, 7, 49, 49, 343, 49, 343, 343, 2401, 1, 7, 7, 49, 7, 49, 49, 343, 7, 49, 49, 343, 49, 343, 343, 2401, 7, 49, 49, 343, 49, 343, 343, 2401, 49, 343, 343, 2401, 343, 2401, 2401, 16807, 1, 7, 7, 49, 7, 49 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
MATHEMATICA
7^(DigitCount[Range[70], 2, 1]-1) (* Harvey P. Dale, Feb 15 2015 *)
CROSSREFS
Sequence in context: A293238 A210708 A210529 * A093564 A081776 A354128
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 25 2009
STATUS
approved

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Last modified March 19 03:33 EDT 2024. Contains 370952 sequences. (Running on oeis4.)