%I #6 May 10 2023 03:50:44
%S 1,2,3,12,25,106,376,1670,7315,35808,176971,910940,4782220,25663080,
%T 139884020,773939566,4334475055,24546800088,140363450663,809676156506,
%U 4707204024505,27561115755712,162415358799242,962751492786378,5737779091829582
%N Number of nondecreasing arrangements of n numbers x(i) in (n1)..(n1) with the sum of sign(x(i))*x(i)^2 zero
%C Column 1 of A188002
%e All solutions for n=3
%e .1...2....0
%e ..0....0....0
%e ..1....2....0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 18 2011
%E Terms from a(19) on by _R. J. Mathar_, May 10 2023
