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.
Miguel-Ángel Pérez García-Ortega's wiki page.
Miguel-Ángel Pérez García-Ortega has authored 66 sequences. Here are the ten most recent ones:
n=1: 3, 4, 5; n=2: 11, 60, 61; n=3: 23, 264, 265; ...
a=Table[(n(n+1)),{n,1,16}];Apply[Join,Map[{2#-1,2#^2-2#,2#^2-2#+1}&,a]]
For n=2, the short leg is A385022(2,1) = 11 and the long leg is A385022(2,2) = 60 so the area is then a(2) = (11 * 60)/2 = 330.
a=Table[n(n+1),{n,1,30}];Apply[Join,Map[{#(#-1)(2#-1)}&,a]]
Triangles begin: n=1: 5, 12, 13; n=2: 13, 84, 85; n=3: 25, 312, 313; ... This sequence gives the middle column.
For n=1, the short leg is A384288(1,1) = 5 and the long leg is A384288(1,2) = 12 so the area is then a(1) = (5 * 12 )/2 = 30.
a=Table[(n(n+1)),{n,0,30}];Apply[Join,Map[{#(#+1)(2#+1)}&,a]]
n=0: -1, 0, 1; n=1: 1, 0, 1; n=2: 5, 12, 13; n=3: 11, 60, 61; ...
a=Table[(n(n+1))/2,{n,0,18}];Apply[Join,Map[{2#-1,2#^2-2#,2#^2-2#+1}&,a]]
For n=3, the short leg is A383615(3,1) = 3 and the long leg is A383615(3,2) = 4 so the sum of the legs is then a(3) = 3 + 4 = 7.
a=Table[(2n)!/(n!(n+1)!),{n,0,23}];Apply[Join,Map[{2#^2-1}&,a]]
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