[seqfan] Re: A264041

Paul Curtz bpcrtz at free.fr
Mon Nov 9 15:41:23 CET 2015


Chris,
Also A264041(2n+5) = A264041(2n-1) + 12*n+16, n>0.
Paul

----- Mail original -----
De: israel at math.ubc.ca
À: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu>
Envoyé: Lundi 9 Novembre 2015 01:53:26
Objet: [seqfan] Re: A264041

Yes, that's my prediction too, based on the empirical g.f.

Cheers,
Robert

On Nov 8 2015, Chris wrote:

> From observation, the 2nd differences of A264041(n), n odd, are 5, 3, 4, 
> 5, 3, 4, ..., so I predict a(27) to be 382. Best regards, Chris Gribble
>
>On Thu, Nov 5, 2015 at 8:11 PM, <israel at math.ubc.ca> wrote:
>
>> Thanks, Rob. That seems like a good idea: this problem has maximal 
>> 4-cliques (corresponding to slashes meeting at an interior vertex) as 
>> well as 2-cliques. However, it still doesn't look like Cplex is going 
>> to manage to compute a(27) on my computer.
>>
>> Cheers,
>> Robert
>
>
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