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 A103501 #13 Jul 07 2023 14:57:48 %S A103501 1,10,46,158,431,974,2022,3837,6777,11263,17947,27541,40835,58904, %T A103501 83081,114543,155232,206901,271573,351583,449833,569225,712847,884408, %U A103501 1088136,1328616,1610007,1937077,2315434,2750476,3250073,3820925,4469597 %N A103501 (1/8)*number of equilateral triangles that can be formed from the points of an (n+1)X(n+1)X(n+1) lattice cube. %H A103501 Ray Chandler, <a href="/A103501/b103501.txt">Table of n, a(n) for n = 1..100</a> %F A103501 a(n) = A102698(n)/8. %Y A103501 Cf. all triangles in lattice cube A103426; special triangles in lattice cube: A103427, A103428, A103429, A103499, A103500; A103158 tetrahedra in lattice cube. %K A103501 nonn %O A103501 1,2 %A A103501 _Hugo Pfoertner_, Feb 08 2005 %E A103501 a(32)-a(100) from _Ray Chandler_, Sep 15 2007