OFFSET

0,2

COMMENTS

LINKS

EXAMPLE

To find a(7): 7 = ...000111; ... 0 0 1 1 = 3 -> 2^3 = 8; ... 0 1 = 1 -> 3^1 = 3; so a(7) = 3*8 = 24.

CROSSREFS

KEYWORD

base,easy,nonn

AUTHOR

Marc LeBrun, Feb 07 2001

STATUS

approved