Search: id:A110377
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%I A110377
%S A110377 1,2,9,28,205,726,8659,47384,562545,4234330,68588311,483088332,
%T A110377 10699776685,102434734598,2016289908585,24588487650736,611171244308689,
%U A110377 6456997293606738,209020565553571999,2838875160624256460
%N A110377 SUM (n!/r!) where r is relatively prime to n and less than n.
%e A110377 a(6) = 6!{1/1! +1/5!}=726.
%p A110377 a:=proc(n) local s,r: s:=0: for r from 1 to n do if gcd(r,n)=1 then s:=s+1/
               r! else s:=s: fi: od: n!*s end: seq(a(n),n=1..23); (Deutsch)
%Y A110377 Cf. A110373, A110374, A038048, A110276.
%Y A110377 Sequence in context: A086511 A138912 A002747 this_sequence A041877 A090208 
               A123058
%Y A110377 Adjacent sequences: A110374 A110375 A110376 this_sequence A110378 A110379 
               A110380
%K A110377 easy,nonn
%O A110377 1,2
%A A110377 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 24 2005
%E A110377 More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jul 25 2005

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