[seqfan] Re: Call for more digits of 1/(3*5) + 1/(5*7) + 1/(7*11)
Hans Havermann
gladhobo at teksavvy.com
Wed Jan 23 04:38:02 CET 2013
For what it's worth, I've added three digits to the 9 that were in A209329. I had a value of 0.13442650968756437 for the sum up to and including 1/(largest-10-digit-prime*smallest-11-digit-prime). The contributions from 5- to 10-digit primes were:
5 9.0085*10^-6
6 7.3442*10^-7
7 6.1915*10^-8
8 5.3439*10^-9
9 4.7004*10^-10
10 4.1954*10^-11
From this I guessed:
11 ~3.786*10^-12
12 ~3.5*10^-13
giving the three extra digits.
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