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 A080775 #2 Mar 31 2012 10:21:59 %S A080775 1,24,1152,82944,7962624,955514880,137594142720,23115815976960, %T A080775 4438236667576320,958659120196485120,230078188847156428800, %U A080775 60740641855649297203200,17493304854426997594521600,5457911114581223249490739200,1833858134499291011828888371200,660188928419744764258399813632000 %N A080775 Number of n X n monomial matrices whose nonzero entries are unit Hurwitz quaternions. %F A080775 a(n) = 24^n*n!. %Y A080775 Cf. A000165, A047053, A051189. %K A080775 nonn %O A080775 0,2 %A A080775 _Artur Jasinski_, Mar 11 2003