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 A271081 #6 Apr 02 2016 23:23:45 %S A271081 1,2,9,2089,3144692,2748613397101,107008949868167431857 %N A271081 Number of ways to tile an n X n X n cube with 1 X 1 X 1 and 2 X 2 X 2 tiles. %e A271081 There are 9 ways to tile a cube of side length 3 with cubes of side length 1 and 2, so a(3) = 9. %Y A271081 Cf. A063443 (a 2D version of this tiling count). %K A271081 nonn,more %O A271081 1,2 %A A271081 _Johan Nilsson_, Mar 30 2016