%I #8 Sep 30 2022 13:23:30

%S 0,0,0,0,0,0,448,3136,25088,238080,2780160,32409600,439263232,

%T 5793579008,84589174784,1277254508544,20436072136704,347559326515200,

%U 6269816107433984,119673237950431232,2402480754490605568,50578266728651816960,1116823836321860550656

%N Differences between factorials and Xfactorials: A048631 - A000142.

%F a(n) = n! - Xfactorial(n).

%Y Cf. A000142, A048631.

%K easy,nonn

%O 0,7

%A _Antti Karttunen_, Jul 14 1999