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

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

%S 1,1,2,3,3,5,5,5,7,8,9,8,9,12,11,13,12,14,14,16,17,15,19,18,18,22,21,

%T 22,21,23,25,23,27,26,28,29,26,31,28,34,32,30,34,34,37,36,34,38,37,40,

%U 41,42,41,40,43,42,47,44,47,45,48

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

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

%K nonn

%O 0,3

%A _Clark Kimberling_