[seqfan] Re: A259444

[Hans Havermann]

Can you example what comes after 15? Why is 4^2 not avoided? More specifically, how is the sequence different from A007916 (which avoids 16)?

> On Oct 25, 2015, at 11:54 AM, Neil Sloane <njasloane at gmail.com> wrote:
> 
> It looks like ^ is exponentation, which is what it always is
> 
> After 2, we have to avoid 2^2 = 4, so 3 works
> 
> After 2,3 we have to avoid 2^2=4, 2^3=8, 3^2=9, 3^3=27, so 5 works,
> also 6, also 7. Then 10, 11 and so on
> 
> I will add some examples to the sequence