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 A177946 #8 Sep 08 2015 10:14:03 %S A177946 2,3,20,210,332640,8648640,70572902400,3016991577600, %T A177946 71241227785728000,2436552577639909048320000, %U A177946 205999445200465037721600000,28734252852655074735274328064000000,5372155913332392772506888374845440000000 %N A177946 a(n) = prime(n)! / n!. %H A177946 <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>. %F A177946 a(n) = A039716(n)/A000142(n). %o A177946 (PARI) a(n) = prime(n)! / n!; \\ _Michel Marcus_, Sep 08 2015 %Y A177946 Cf. A000142, A039716, A157132. %K A177946 nonn %O A177946 1,1 %A A177946 _Reinhard Zumkeller_, May 15 2010 %E A177946 More terms from _Michel Marcus_, Sep 08 2015