A036704 a(n)=number of Gaussian integers z=a+bi satisfying |z|<=n+1/2.

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

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 * A338911 A107890 A110209

Adjacent sequences: A036701 A036702 A036703 * A036705 A036706 A036707

Keyword

nonn

Author

Clark Kimberling

Status

approved