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 A109096 #9 Sep 02 2013 12:29:08 %S A109096 4,10,12,16,36,48,144,240,576,720,1440,2880,4320,10080,14400,17280, %T A109096 30240,80640,86400 %N A109096 Numbers n such that n! is the product of exactly three smaller factorials. %e A109096 144! = 3! * 4! * 143!, so 144 is in the sequence. %Y A109096 Cf. A034878, A001013, A003135, A058295, A075082, A109095, A109097. %K A109096 nonn %O A109096 1,1 %A A109096 _Jud McCranie_, Jun 19 2005 %E A109096 Definition corrected by _Jon E. Schoenfield_, Jul 02 2010