[seqfan] Re: No right isosceles triangles in a square grid

[Neil Sloane]

> 1, 2, 4, 6, 8, 10, 12, 14, 14, 16, 20

Could there be a typo? Did you mean to say

1, 2, 4, 6, 8, 10, 12, 14,  16, 20 ?
Because you can get 16 for the 9 X 9 case using two edges, and
similarly a(n) >= 2n-2 for all n

If this is correct, could you show your a(10)=20 solution?

Best regards
Neil

Neil J. A. Sloane, President, OEIS Foundation.
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
Phone: 732 828 6098; home page: http://NeilSloane.com
Email: njasloane at gmail.com


On Fri, Apr 22, 2016 at 10:38 AM, Giovanni Resta <g.resta at iit.cnr.it> wrote:

> On 04/22/2016 04:21 PM, Neil Sloane wrote:
>
>> Giovanni, Thank you very much for those results!
>>
>> They are now in A271906 and A271907
>>
>> Sometime, could you add more illustrations for them? Perhaps like the
>> lovely pictures with red dots that you made for A227133?
>>
>
> Sure. Later today or tomorrow.
> Giovanni
>
>
>
>
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