[seqfan] What defines A133992

Richard Mathar mathar at strw.leidenuniv.nl
Mon Jun 28 21:36:52 CEST 2010

Can anyone figure out what the correct definition of
currently defined as Sigma(prime(n)*prime(prime(n))-1) could be?

I get a very different sequence A133992 from the definition.
I'd expect this to be sigma(A073065(n)-1) where sigma(.) =  A000203(.)
So what defines A133992?


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