smallest all-semiprime magic square

[Jonathan Post]

Seems to me that there's enough here for a paper "Semiprime Magic Squares"
by Franklin T. Adams-Watters, Tony Noe, Jonathan Vos Post,  and David
Wilson. References also to Bob Barbour, Geoff Landis, George Hockney, and
Peter Loly.

Still open questions; still enumeration questions; and perhaps "Semiprime
Magic Cubes" would be another paper; To start that, what is the smallest
cubefree magic cube? Or "k-almost-prime Magic Squares."

Anyone want to actually coauthor, come January 2007? And what is the
intended target journal?

-- Jonathan Vos Post

On 12/24/06, David Wilson <davidwwilson at comcast.net> wrote:
>
> Also the smallest squarefree square(!) is
>
> 5 19 15
> 23 13 3
> 11 7 21
>
> with sum 39.
>
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