Abstract
Suppose that and . We construct a Latin square of order n with the following properties: has no proper subsquares of order 3 or more. has exactly one intercalate (subsquare of order 2). When the intercalate is replaced by the other possible subsquare on the same symbols, the resulting Latin square is in the same species as . Hence generalizes the square that Sade famously found to complete Norton's enumeration of Latin squares of order 7. In particular, is what is known as a self-switching Latin square and possesses a near-autoparatopism.
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