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 A289253 #12 Mar 02 2020 23:27:47 %S A289253 1134,1176,1344,1386,1470,1596,1680,1764,1848,1890,2016,2058,2184, %T A289253 2310,2394,2520,2604,2856,2940,3024,3360,3696,3780,3864,4032,4242, %U A289253 4368,4536,4830,5292,5544,5712,6006,6090,6216,6258,6510,6636,6720 %N A289253 Areas of integer-sided triangles whose area equals 7 times their perimeter. %H A289253 Zhining Yang, <a href="/A289253/b289253.txt">Table of n, a(n) for n = 1..77</a> %e A289253 The areas 1134,1176,1344,1386,1470, ... pertain respectively to triangles with sides (39,60,63), (42,56,70), (40,68,84), (36,77,85), (35,84,91)...., equal 7 times their perimeter 162,168,192,198,210,... %Y A289253 Cf. A098030, A289218, A289219, A289220, A289221. %Y A289253 A row of the triangle in A290451. %Y A289253 Cf. A332927 (listing distinct triangles with identical areas separately). %K A289253 fini,full,nonn %O A289253 1,1 %A A289253 _Zhining Yang_, Jun 29 2017