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a(n)=number of Gaussian integers z=a+bi satisfying |z|<=n+1/2, a>=0, b>=0.
0

%I #7 Mar 30 2012 18:56:27

%S 1,4,8,13,22,30,41,52,65,83,98,117,135,158,181,203,232,261,290,320,

%T 349,386,422,459,496,539,581,622,669,713,764,813,861,914,971,1028,

%U 1086,1143,1206,1266,1333,1396,1463,1533,1600,1673,1743

%N a(n)=number of Gaussian integers z=a+bi satisfying |z|<=n+1/2, a>=0, b>=0.

%H <a href="/index/Ga#gaussians">Index entries for Gaussian integers and primes</a>

%K nonn

%O 0,2

%A _Clark Kimberling_