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A151785 7^{wt(n)-1} where wt(n) is the binary weight of n (A000120). 5
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

Table of n, a(n) for n=1..69.

MATHEMATICA

7^(DigitCount[Range[70], 2, 1]-1) (* Harvey P. Dale, Feb 15 2015 *)

CROSSREFS

Cf. A000120.

Sequence in context: A293238 A210708 A210529 * A093564 A081776 A256255

Adjacent sequences:  A151782 A151783 A151784 * A151786 A151787 A151788

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 25 2009

STATUS

approved

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Last modified January 26 05:40 EST 2020. Contains 331273 sequences. (Running on oeis4.)