[seqfan] Re: Sum of any pair of primes (or non-primes) is not in S

Eric Angelini Eric.Angelini at kntv.be
Sun Feb 16 01:37:29 CET 2014


Hello David,
my apologizes -- I should have been more clear:

> The sum of any pair of primes is not in the sequence S 

... should be understood:

> The sum of any pair of primes of S is not in the sequence S 

Best,
E.

Catapulté de mon aPhone

> Le 15 févr. 2014 à 18:37, "David Applegate" <david at research.att.com> a écrit :
> 
> I don't understand.  For sums of distinct primes I find 2+5=7, 3+5=8,
> 5+7=12, 2+13=15, 5+11=16, 2+19=21, etc. in S.
> 
> And for sums of non-primes, 4+9=13, 6+9=15, etc. are in T.
> 
> David Applegate
> 
>> From seqfan-bounces at list.seqfan.eu Sat Feb 15 12:26:28 2014
>> From: Eric Angelini <Eric.Angelini at kntv.be>
>> To: Sequence Discussion list <seqfan at list.seqfan.eu>
>> Date: Sat, 15 Feb 2014 18:26:06 +0100
>> Subject: [seqfan] Sum of any pair of primes (or non-primes) is not in S
> 
>> Hello SeqFans,
>> The sum of any pair of primes is not 
>> in the sequence S (if I'm not wrong):
> 
>> S=1,2,3,4,6,7,8,11,12,15,16,17,21,22,
>> 23,27,29,33,35,37,38,41,...
> 
>> Similarily, the sum of any pair of non-primes 
>> is not in the sequence T:
> 
>> T=1,2,3,4,6,8,11,13,15,17,18,20,25,27,30,32,37,39,41,44,...
> 
>> Best,
>> ??.
> 
>> _______________________________________________
> 
>> Seqfan Mailing list - http://list.seqfan.eu/
> 
> 
> _______________________________________________
> 
> Seqfan Mailing list - http://list.seqfan.eu/


More information about the SeqFan mailing list