[seqfan] How many squares can you make from n points in the plane?

[Neil Sloane]

It seems that surprisingly little is known - see A051602. Even a(7) is an
open question, although it is easy to see that a(7) >= 3.

Best regards
Neil

Neil J. A. Sloane, Chairman, OEIS Foundation.
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
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