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%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
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