OFFSET
1,1
LINKS
J. Wallgren, Hierarchical sequences
FORMULA
a(n) = 4*A006519(n)
PROG
(PARI) a(n)=4<<valuation(n, 2) \\ Charles R Greathouse IV, Jan 06 2018
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonas Wallgren, Feb 02 2001
STATUS
approved