OFFSET
1,2
FORMULA
For n>1, a(n) = A079801(n-1) + 1. Also, a(n) = (sqrt(8*(A079798(1) + A079798(2) + ... + A079798(n-1)) + 1) + 1) / 2. - Max Alekseyev, May 08 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Feb 05 2003
EXTENSIONS
Extended by Max Alekseyev, May 08 2009
STATUS
approved