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 A112579 #7 Sep 08 2013 02:57:22 %S A112579 0,8,900,366336,378028800,833156928000,3477528928742400, %T A112579 25183876050321408000,296058177312000019660800, %U A112579 5362158372805111867637760000,143458227395428379364635443200000 %N A112579 Number of 3-D arrays of 0's and 1's with plane sums 2. %D A112579 P. J. Cameron and T. W. Mueller, Decomposable functors and the exponential principle, II, in preparation %H A112579 P. J. Cameron and T. W. Mueller, <a href="http://arxiv.org/abs/0911.3760v2">Decomposable functors and the exponential principle, II</a>, arXiv:0911.3760 [math.CO] %F A112579 a(n) = b(n) + Sum (k/n)*(n choose k)^3*b(k)*a(n-k), where b(n) counts indecomposable arrays (A112578). %e A112579 a(2)=8: six pairs of opposite edges and two inscribed tetrahedra. %Y A112579 Cf. A001499 (2-D case), A112578, A112580. %K A112579 nonn,easy %O A112579 1,2 %A A112579 _Peter J. Cameron_, Sep 14 2005