login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A036704 a(n)=number of Gaussian integers z=a+bi satisfying |z|<=n+1/2. 2
1, 9, 21, 37, 69, 97, 137, 177, 225, 293, 349, 421, 489, 577, 665, 749, 861, 973, 1085, 1201, 1313, 1457, 1597, 1741, 1885, 2053, 2217, 2377, 2561, 2733, 2933, 3125, 3313, 3521, 3745, 3969, 4197, 4421, 4669, 4905, 5169, 5417 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Robert Israel, Table of n, a(n) for n = 0..10000

Clive Tooth, A selection of a(n) values for n up to 10^9

Index entries for Gaussian integers and primes

FORMULA

a(n) = A057655(n^2+n). - Robert Israel, Sep 29 2014

CROSSREFS

Cf. A057655.

Sequence in context: A140673 A186294 A059993 * A107890 A110209 A184040

Adjacent sequences:  A036701 A036702 A036703 * A036705 A036706 A036707

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified November 22 16:20 EST 2014. Contains 249807 sequences.