[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.


More information about the SeqFan mailing list