OFFSET
1,2
EXAMPLE
Let b(n)=n-th positive integer of the form a(k)+floor(k/2). Clearly a(1)=1, so b(1)=1, so a(2)=2, so b(2)=3, so a(3)=4 and so on.
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jan 13 2005
STATUS
approved