A151789 a(1)=1; for n > 1, a(n)=5*4^{wt(n-1)-1}.

1, 5, 5, 20, 5, 20, 20, 80, 5, 20, 20, 80, 20, 80, 80, 320, 5, 20, 20, 80, 20, 80, 80, 320, 20, 80, 80, 320, 80, 320, 320, 1280, 5, 20, 20, 80, 20, 80, 80, 320, 20, 80, 80, 320, 80, 320, 320, 1280, 20, 80, 80, 320, 80, 320, 320, 1280, 80, 320, 320, 1280, 320, 1280, 1280, 5120

Offset

1,2

Comments

wt(n) is the Hamming weight = binary weight of n (A000120).

Links

Table of n, a(n) for n=1..64.

Crossrefs

Cf. A000120.

Sequence in context: A274910 A370547 A201803 * A339320 A302176 A094338

Adjacent sequences: A151786 A151787 A151788 * A151790 A151791 A151792

Keyword

nonn

Author

N. J. A. Sloane, Jun 25 2009

Status

approved