OFFSET
1,1
COMMENTS
This has been searched through 2^33.
The index of a(11) is 75558337841. a(12) > 2^44. - Giovanni Resta, Feb 12 2013
EXAMPLE
The binary representations of the first three terms and their indices are 101 and 11, 10001 and 111, and 1001001 and 10101.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
James G. Merickel, Feb 09 2013
EXTENSIONS
a(11) from Giovanni Resta, Feb 12 2013
STATUS
approved