This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A095267 #10 Jul 27 2017 03:41:02 %S A095267 12,84,1092,20748,643188,23797956,1023312108,62422038588, %T A095267 4182276585396,305306190733908,24119189067978732,2339561339593937004, %U A095267 240974817978175511412,26266255159621130743908 %N A095267 Least perimeter common to 2^n primitive arithmetic triangles, i.e., Heronian triangles whose sides are in arithmetic progression. %H A095267 K. S. Brown, <a href="http://www.mathpages.com/home/kmath474.htm">Highly Heronian Ellipses</a> %F A095267 a(n) = 3*A095288(n) = a(n-1)*A002476(n). - _Ray Chandler_, Jul 09 2004 %e A095267 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 A095267 Cf. A086909. %K A095267 nonn %O A095267 0,1 %A A095267 _Lekraj Beedassy_, Jul 02 2004 %E A095267 More terms from _Ray Chandler_, Jul 09 2004