OFFSET
1,2
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..80
FORMULA
a(2*n) = 2^(n+1) - 1. - Max Alekseyev, May 13 2010
MATHEMATICA
Table[Apply[Plus, Last[ContinuedFraction[Sqrt[ -1+2^u]]]], {u, 1, 25}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Nov 13 2002
EXTENSIONS
a(1) corrected, a(26) and on added by Max Alekseyev, May 13 2010
STATUS
approved