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%I #2 Mar 30 2012 17:40:19
%S 1,5,9,9,9,9,9,9,9,9,9,9,9,9,9,9,13,21,21,21,21,21,21,21,21,21,21,21,
%T 21,21,21,21,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,
%U 25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25
%N Partial sums of A175372.
%C Number of integer pairs (x,y) satisfying x^4+y^4 <= n, any -n <= x,y <=n.
%e a(6) = 9 counts (x,y) = (-1,-1), (-1,0), (-1,1), (0,-1), (0,0), (0,1), (1,-1), (1,0) and (1,1).
%Y Cf. A057655, A175363.
%K nonn
%O 0,2
%A _R. J. Mathar_, Apr 24 2010
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