[seqfan] Re: 3D version of A000938: 3-in-line inside the nXnXn cube

[Ron Hardin]

Incidentally the title for A000938

"From the no-3-in-line problem on n X n grid (see references for precise definition)."

could be more informative.

"Sets of 3 collinear points in an nXn grid" seems minimal.

Then misgivings about precision come in

"Sets of 3 distinct collinear points in an nXn grid"

...and so forth

 rhhardin at mindspring.com
rhhardin at att.net (either)



----- Original Message ----
> From: N. J. A. Sloane <njas at research.att.com>
> To: seqfan at seqfan.eu
> Sent: Sat, May 22, 2010 6:12:15 PM
> Subject: [seqfan] Re: 3D version of A000938: 3-in-line inside the nXnXn cube
> 
> I'm adding this to the OEIS - it will be 
> A157882.
Neil



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