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%I #6 May 10 2023 03:53:38
%S 1,3,4,17,45,176,644,2983,13675,67487,340192,1775300,9438436,51112686,
%T 281006680,1565898705,8826775421,50268025897,288898607594,
%U 1674035743383,9772219545537,57429659103938,339574982244340,2019144043582652,12067931396139136
%N Number of nondecreasing arrangements of n numbers x(i) in -n..n with the sum of sign(x(i))*x(i)^2 zero
%C Column 2 of A188002
%e All solutions for n=3
%e .-3...-2...-1....0
%e ..0....0....0....0
%e ..3....2....1....0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 18 2011
%E Terms from a(18) on from _R. J. Mathar_, May 10 2023