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A085625 Numbers that are the sum of 2 squares in exactly 2 ways. 1

%I #8 Nov 03 2017 18:56:28

%S 25,50,65,85,100,125,130,145,169,170,185,200,205,221,225,250,260,265,

%T 289,290,305,338,340,365,370,377,400,410,442,445,450,481,485,493,500,

%U 505,520,530,533,545,565,578,580,585,610,629,676,680,685,689,697,730

%N Numbers that are the sum of 2 squares in exactly 2 ways.

%H Robert Price, <a href="/A085625/b085625.txt">Table of n, a(n) for n = 1..16794</a>

%F n such that A000161(n)=2.

%e a(3)=65 because 65=8^2+1^2=7^2+4^2,

%e a(4)=85 because 9^2+2^2=7^2+6^2.

%Y Cf. A000161, A000446.

%K nonn

%O 1,1

%A _Hugo Pfoertner_, Jul 09 2003

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Last modified August 17 19:02 EDT 2024. Contains 375227 sequences. (Running on oeis4.)