a(n-2) | (a(n)+a(n-1)): only primes

[Antti Karttunen]

Antti Karttunen wrote:

> I think it's a hidden unconscious assumption we are all sometimes 
> guilty of. In this case: "and different from the previous term".
>
Moreover: without that condition it doesn't make a very interesting 
sequence...

> -- Antti


> Peter Pein wrote:
>
>> zak seidov schrieb:
>>
>>> Dear seqfans,
>>> Anyone with C++ may wish to add more terms?
>>> Thanks, Zak
>>>
>>> %S A000001
>>> 2,3,5,7,3,11,7,37,5,439,11,7013,379,27673,373,54973,977,548753,4229,7678313,10009,230339381,27763,5067438619,197297 
>>>
>>> %N A000001 a(1) =2 , a(2) = 3, a(n) = least prime such
>>> that a(n-2) | (a(n)+a(n-1))
>>> %A A000001 Zak Seidov  (zakseidov at gmail.com), Jan 07
>>> 2007
>>
>> Sorry,
>> I do not understand, why a(3) = 5 > 3, because 2 | (3 + 3)
>> ??  
>
>> Peter
>