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Squares of the form 4*A014574(n-1) + 1.
1

%I #9 Sep 16 2015 13:03:30

%S 25,49,121,169,289,961,1681,1849,2401,5929,6889,10201,11881,14161,

%T 17689,32041,41209,69169,76729,80089,94249,96721,108241,124609,142129,

%U 165649,170569,175561,185761,190969,214369,223729,243049,332929,337561

%N Squares of the form 4*A014574(n-1) + 1.

%H Vincenzo Librandi, <a href="/A131706/b131706.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[600]^2, PrimeQ[(# - 1)/4 - 1] && PrimeQ[(# - 1)/4 + 1] &] (* _Stefan Steinerberger_, Sep 17 2007 *)

%K nonn

%O 1,1

%A _Giovanni Teofilatto_, Sep 17 2007

%E More terms from _Stefan Steinerberger_, Sep 17 2007