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 A095288 #12 Jul 27 2017 03:41:06 %S A095288 4,28,364,6916,214396,7932652,341104036,20807346196,1394092195132, %T A095288 101768730244636,8039729689326244,779853779864645668, %U A095288 80324939326058503804,8755418386540376914636,1111938135090627868158772 %N A095288 Least middle side of 2^n primitive arithmetic triangles, i.e., primitive Heronian triangles whose sides are in arithmetic progression. %F A095288 a(n) = A095267(n)/3 = a(n-1) * A002476(n). - _Ray Chandler_, Jul 09 2004 %e A095288 6916 is the first middle side belonging to 2^3=8 arithmetic triangles, viz., (3485,6916,10347), (3747,6916,10085), (4133,6916,9699), (4299,6916,9533), (4827,6916,9005), (5045,6916,8787), (5333,6916,8499), (6267,6916,7565) of common differences 3431, 3169, 2783, 2617, 2089, 1871, 1583, 649 respectively and integral areas. (Perimeter is obviously three times middle side and hence the same for all the triangles.) %Y A095288 Cf. A086909. %K A095288 nonn %O A095288 0,1 %A A095288 _Lekraj Beedassy_, Jul 02 2004 %E A095288 More terms from _Ray Chandler_, Jul 09 2004