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A048836 Decimal expansion of Sum_{n >= 2} (n / Product_{i=2..n} K(i)), where K(i) is the Kempner function A002034.

%I A048836 #22 Feb 16 2025 08:32:40
%S A048836 1,7,2,8,7,5,7,6,0,5,3,0,2,2,3,4,1,2,2,4,1,1,2,7,5,2,3,0,3,8,5,3,8,7,
%T A048836 6,7,4,5,9,6,6,0,6,7,7,9,1,4,8,5,1,3,1,0,5,2,6,6,4,7,6,9,0,5,6,3,2,4,
%U A048836 8,6,9,5,8,8,9,3,1,3,7,2,1,7,9,7,3,8,0,4,9,7,4,6,2,5,3,7,0,1,1,9
%N A048836 Decimal expansion of Sum_{n >= 2} (n / Product_{i=2..n} K(i)), where K(i) is the Kempner function A002034.
%D A048836 I. Cojocaru, S. Cojocaru, The Third and Fourth Constants of Smarandache, Smarandache Notions Journal, Vol. 7, No. 1-2-3, 1996, 121-126.
%H A048836 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SmarandacheConstants.html">Smarandache Constants</a>
%e A048836 1.72875760530223...
%o A048836 (PARI)
%o A048836 S(n)=local(m);if(isprime(n),n,m=1;while(m!%n!=0,m++);m)
%o A048836 S4(a,k)=local(v,i,p,y);v=vector(k,i,S(i));p=1;y=0.;for(i=2,k,p*=v[i];y+=i^a/p);y
%o A048836 S4(1,200) \\ _Franklin T. Adams-Watters_, Apr 18 2006
%K A048836 nonn,cons
%O A048836 1,2
%A A048836 Charles T. Le (charlestle(AT)yahoo.com)
%E A048836 More terms from _Franklin T. Adams-Watters_, Apr 18 2006
%E A048836 Name corrected by _Sean A. Irvine_, Jul 10 2021