A097430 Integer part of the radii of circles with area n.

0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5

Offset

1,13

Links

Table of n, a(n) for n=1..105.

Formula

Radius = floor(sqrt(Area/Pi)).

Example

If A = 4. floor(sqrt(4/Pi)) = 1, the 4th entry.

Prog

(PARI) f(n) = for(x=1, n, print1(floor(sqrt(x/Pi))", "))

Crossrefs

Sequence in context: A377722 A373095 A056811 * A054900 A046042 A287866

Adjacent sequences: A097427 A097428 A097429 * A097431 A097432 A097433

Keyword

nonn

Author

Cino Hilliard, Aug 22 2004

Status

approved