[seqfan] Re: A090940: Rearrangement(?) of odd primes

Heinz, Alois alois.heinz at hs-heilbronn.de
Wed Nov 21 13:32:43 CET 2012


Dear Zak,

a(3228) = 43.

No prime is excluded, so it may occur later.

Best regards, Alois

Am 21.11.2012 09:52, schrieb zak seidov:
> Dear seqfans,
> Is A090940 really rearrangement?
>   
> If we take each time the smallest possible a(n)
> (as assumed I guess)
> then first absent prime is prime(14) = 43
> (checked for first 1000 terms).
>
> We need to omit the requirement of "smallest possible a(n)"
> but then no proof that it's rearrangement anyway.
>
> A090940Rearrangement of odd primes so that every partial arithmetic mean is a prime.
>
> See also:
> A090918 Beginning with 3, least prime, greater than the previous term,
>          such that the arithmetic mean of first n terms is a prime.
>
> Best,
> Zak



More information about the SeqFan mailing list