OFFSET
1,1
COMMENTS
2n - a(n) is in {0,1} for n >=1.
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
EXAMPLE
As a word, A284905 = 011001..., in which 1 is in positions 2,3,6,7,10,...
MATHEMATICA
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 17 2017
STATUS
approved