login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A097689 Number of prime pairs (p,q) with p^2 + q^2 <= n^2. 0
0, 0, 1, 3, 4, 8, 8, 13, 15, 16, 16, 20, 22, 30, 32, 33, 33, 41, 44, 50, 54, 58, 58, 66, 69, 73, 76, 76, 78, 88, 88, 100, 103, 107, 109, 111, 113, 123, 127, 129, 131, 142, 146, 159, 165, 167, 169, 183, 191, 193, 197, 201, 204, 214, 218, 224, 230, 233, 233, 245, 252, 268 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..62.

CROSSREFS

Cf. A001182, A000720.

Sequence in context: A034772 A197138 A065309 * A258326 A308769 A002246

Adjacent sequences:  A097686 A097687 A097688 * A097690 A097691 A097692

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 21 2004

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 7 23:38 EDT 2020. Contains 336279 sequences. (Running on oeis4.)