OFFSET
1,2
LINKS
Rajan Murthy, Table of n, a(n) for n = 1..2623
EXAMPLE
When the radius increases from 0 to sqrt(2), one square is completely encircled (a(1)). When the radius increases from sqrt(2) to sqrt(3), two more squares are encircled (a(2)). When the radius increases from sqrt(45) to sqrt(50), three more squares are encircled(a(18)).
CROSSREFS
KEYWORD
nonn
AUTHOR
Rajan Murthy and Vale Murthy, Dec 19 2013
STATUS
approved