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%I #10 Jul 27 2017 03:41:02
%S 12,84,1092,20748,643188,23797956,1023312108,62422038588,
%T 4182276585396,305306190733908,24119189067978732,2339561339593937004,
%U 240974817978175511412,26266255159621130743908
%N Least perimeter common to 2^n primitive arithmetic triangles, i.e., Heronian triangles whose sides are in arithmetic progression.
%H K. S. Brown, <a href="http://www.mathpages.com/home/kmath474.htm">Highly Heronian Ellipses</a>
%F a(n) = 3*A095288(n) = a(n-1)*A002476(n). - _Ray Chandler_, Jul 09 2004
%e 1092 is the perimeter common to the 2^2=4 arithmetic triangles (183,364,545), (185,364,543), (257,364,471), (303,364,425) having common differences 181, 179, 107, 61 and areas 6006, 10376, 46410, 54054, respectively. (Middle side is the same in all triangles.)
%Y Cf. A086909.
%K nonn
%O 0,1
%A _Lekraj Beedassy_, Jul 02 2004
%E More terms from _Ray Chandler_, Jul 09 2004
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