OFFSET
1,2
COMMENTS
It seems that lim_{n->inf} a(n)/n = 9/5. [This is true. The asymptotic density of this sequence is 5/9. - Amiram Eldar, Jan 16 2022]
Positions of 0 in the expansion of Sum_{k>=0} x^2^k/(1+x^2^k+x^2^(k+1)) (A084091).
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range[0, 120], Divisible[#, 3]||OddQ[IntegerExponent[#, 2]]&] (* Harvey P. Dale, Jul 26 2017 *)
PROG
(PARI) for(n=0, 300, if(valuation(n, 2)%2||n%3==0, print1(n", ")))
CROSSREFS
KEYWORD
nonn
AUTHOR
Ralf Stephan, May 11 2003
STATUS
approved