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%I #7 Jan 12 2019 10:29:06
%S 5,15,25,35,45,51,55,65,75,85,95,105,115,125,135,145,153,155,165,175,
%T 185,195,205,215,225,235,245,255,265,275,285,295,305,315,325,335,345,
%U 355,357,365,375,385,395,405,415,425,435,445,455,459,465,475,485
%N Odd n such that A015525(n) is not squarefree.
%H Hugo Pfoertner, <a href="/A323354/b323354.txt">Table of n, a(n) for n = 1..5487</a>
%e a(1) = 5: A015525(5) = 361 = 19^2. All multiples of 5 are in the sequence and have 19^2 as a factor.
%e a(6) = 51: A015525(51) = 3005793749329960987137864733842257 = 17^2 * 67 * 307 * 624669523 * 809464558443747299.
%o (PARI) anm2=1;anm1=3;for(n=3,155,an=3*anm1+8*anm2;anm2=anm1;anm1=an;if(n%2&&!issquarefree(an),print1(n,", ")))
%Y Cf. A015525, A323353.
%K nonn
%O 1,1
%A _Hugo Pfoertner_, Jan 12 2019
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