Search: id:A153824
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%I A153824
%S A153824 0,0,1,6,36,240,1698,14304,118800,1118160,11705288,144092256,1738439808,
%T A153824 24817158912,355309325280,5378578601760,86081749397280,1570394279039040,
%U A153824 28281459220193088,572031558109589760,11458497230555094720
%N A153824 Sum of proper divisors of n!: a(n) = sigma(n!) - n!.
%C A153824 a(n) is the sum of proper divisors of factorial number A000142(n).
%F A153824 a(n) = A000203(n!) - n! = A062569(n)-A000142(n) = A001065(A000142(n)).
%p A153824 with(numtheory): seq(sigma(factorial(n))-factorial(n), n = 0 .. 22); 
               [From Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 07 2009]
%Y A153824 Cf. A000142, A000203, A001065, A062569.
%Y A153824 Sequence in context: A099252 A057395 A066053 this_sequence A001286 A049431 
               A049428
%Y A153824 Adjacent sequences: A153821 A153822 A153823 this_sequence A153825 A153826 
               A153827
%K A153824 nonn
%O A153824 0,4
%A A153824 Omar E. Pol (info(AT)polprimos.com), Jan 02 2009
%E A153824 Extended by Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 07 2009

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