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 A036704 a(n)=number of Gaussian integers z=a+bi satisfying |z|<=n+1/2. 3
 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 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 STATUS approved

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Last modified June 20 09:12 EDT 2019. Contains 324234 sequences. (Running on oeis4.)