OFFSET
0,2
COMMENTS
The terms a(4), a(5), a(7) and a(8), if they exist, are > 2*1000000. [Lars Blomberg, Nov 17 2011]
EXAMPLE
a(6) = 22 as 22 - 6 = 16 = 2^4, a power of 2 which has not arisen earlier.
CROSSREFS
KEYWORD
base,more,nonn
AUTHOR
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 01 2003
STATUS
approved