%I
%S 11025,99225,245025,540225,893025,1334025,2205225,3980025,4862025,
%T 5832225,6890625,8037225,8555625,9828225,10595025,10989225,12006225,
%U 14402025,19847025,20385225,24354225,26163225,26471025,29648025,31979025,35820225,38378025,43758225,46580625,49491225,50339025,52490025,55577025,57836025,60140025
%N Odd abundant numbers n for which sigma(n) == 3 (mod 4).
%C These are all squares. Square roots are in A325312.
%H Antti Karttunen, <a href="/A325311/b325311.txt">Table of n, a(n) for n = 1..10000</a>
%H <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>
%o (PARI) isA325311(n) = (n%2 && (3==sigma(n)%4) && sigma(n)>(2*n));
%Y Cf. A000203, A324647, A325312 (square roots).
%Y Intersection of A005231 and A324899. Subsequence of A156942.
%K nonn
%O 1,1
%A _Antti Karttunen_, Apr 20 2019
