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 A218385 #8 Oct 30 2012 16:51:04
%S A218385 4,90,560,4032,302400,34214400,415134720,5448643200,1162377216000,
%T A218385 320118685286400,5792623828992000,110586454917120000,
%U A218385 46833363657400320000,1034080669555399065600,23863400066663055360000,574489260864110592000000,14403266468807344128000000,10162944820390462016716800000
%N A218385 (n-2)!/n when an integer.
%C A218385 n divides (n-2)! for all composite n >= 6.
%e A218385 a(1) = 4 because 4!/6 = 4. That is, 6 divides 4!.
%e A218385 a(2) =90 because the next composite number after 6 is 8. 6!/8 = 90, which means 8 divides 6!
%t A218385 f[n_] := If[PrimeQ[n], 0, (n-2)!/n]; Select[Table[f[n], {n,30}], IntegerQ[#] && #>0&]
%Y A218385 Cf. A129906.
%K A218385 nonn
%O A218385 1,1
%A A218385 _Geoffrey Critzer_, Oct 27 2012