[seqfan] Re: Primes and prime sums

[Maximilian Hasler]

Can anyone find the index at which will appear the number 4?

Maximilian


On Mon, Jan 14, 2013 at 1:19 PM, Eric Angelini <Eric.Angelini at kntv.be> wrote:
> Hello Seq-Fans,
>
> Write down the prime numbers:
> 2, 3, 5, 7, 11, 13, 17, 19, 23, ...
>
> Insert between two primes the
> smallest integer not yet present
> in the sequence such that two
> neighboring integers sum up to
> a prime.
>
> I think the sequence starts:
> 2,0,3,8,5,6,7,12,11,18,13,26,17,...
> Best,
> É.
>
>
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