OFFSET
1,1
EXAMPLE
a(3) = A.M. of {102,105,...,996,999} = Floor[(102+999)/2] =550.
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Amarnath Murthy, Aug 02 2005
EXTENSIONS
Corrected and extended by Joshua Zucker, May 10 2006
STATUS
approved