A097429 Integer part of the radii of circles with prime areas.

0, 0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12

Offset

2,6

Links

Table of n, a(n) for n=2..92.

Formula

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

Example

If A = 5. floor(sqrt(5/Pi)) = 1, the third entry.

Prog

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

Crossrefs

Sequence in context: A003058 A000194 A168255 * A100617 A076471 A339391

Adjacent sequences: A097426 A097427 A097428 * A097430 A097431 A097432

Keyword

nonn

Author

Cino Hilliard, Aug 22 2004

Status

approved