OFFSET
1,1
COMMENTS
wt(m) = A000120(m).
These are numbers k such that A228085(2^k) = A228085(k-1) = 0, or numbers k such that 2^k is a binary self number (A010061). - Amiram Eldar, Feb 23 2021
LINKS
FORMULA
a(n) = A010061(n) + 1.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Oct 23 2013
STATUS
approved