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 A177188 #4 Jun 02 2025 02:54:23 %S A177188 0,2,1968,16467840,554765137920,52485654509568000, %T A177188 11281219212469764096000,4790353998374876546334720000, %U A177188 3639616082290561423547931033600000 %N A177188 Quotients of A024167(4n) and 6n+1. %e A177188 For n=2, A024167(4n) = A024167(8) = 8! * (1 - 1/2 +- ... - 1/8) = 25584, so a(2) = 25584/(6n+1) = 25584/13 = 1968 %Y A177188 See A024167. Also see A177174. %K A177188 nonn %O A177188 0,2 %A A177188 _Jens Voß_, May 04 2010