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 A103658 #3 Mar 31 2012 10:29:09 %S A103658 12,2918,64576,673943,4058656,19462319,70636336,224091378,621046332, %T A103658 1573877652,3582064304,3582064304,15781332296 %N A103658 Number of configurations of 4 distinct points chosen from an (n+1) X (n+1) X (n+1) lattice cube resulting in objects with volume=0. %e A103658 a(1)=12 because the 6 faces and 6 diagonal cuts along parallel diagonals of opposite faces through a cube are objects with 4 distinct points with volume=0. %Y A103658 Cf. A103157 binomial((n+1)^3, 4), A103656 triangular pyramids with volume>0 in lattice cube. a(n)=A103157(n)-2*A103656(n). %K A103658 hard,more,nonn %O A103658 1,1 %A A103658 _Hugo Pfoertner_, Feb 14 2005