A048837 Decimal expansion of Sum_{n >= 2} (n^2 / Product_{i=2..n} K(i)), where K(i) is the Kempner function A002034.

4, 5, 0, 2, 5, 1, 2, 0, 0, 6, 1, 9, 2, 9, 6, 9, 7, 0, 6, 9, 3, 4, 0, 7, 7, 2, 7, 4, 8, 3, 2, 4, 4, 5, 6, 4, 1, 9, 7, 6, 5, 1, 3, 1, 4, 7, 4, 6, 9, 1, 3, 3, 3, 0, 4, 1, 1, 8, 9, 8, 7, 5, 3, 6, 5, 2, 8, 0, 8, 5, 2, 7, 0, 1, 5, 5, 0, 1, 1, 0, 6, 6, 7, 3, 1, 1, 1, 5, 6, 3, 9, 5, 2, 2, 5, 6, 2, 3, 1, 3

Offset

1,1

References

I. Cojocaru, S. Cojocaru, The Third and Fourth Constants of Smarandache, Smarandache Notions Journal, Vol. 7, No. 1-2-3, 1996, 121-126.

Links

Table of n, a(n) for n=1..100.

Eric Weisstein's World of Mathematics, Smarandache Constants

Example

4.5025120061929697...

Prog

(PARI) S(n)=local(m); if(isprime(n), n, m=1; while(m!%n!=0, m++); m 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 S4(2, 200) \\ Franklin T. Adams-Watters, Apr 18 2006

Crossrefs

Sequence in context: A199621 A199390 A270914 * A353450 A087492 A366362

Adjacent sequences: A048834 A048835 A048836 * A048838 A048839 A048840

Keyword

nonn,cons

Author

Charles T. Le (charlestle(AT)yahoo.com)

Extensions

More terms from Franklin T. Adams-Watters, Apr 18 2006

Name corrected by Sean A. Irvine, Jul 10 2021

Status

approved