Grids Of Coprime Rows, Columns, (Diagonals)

Leroy Quet qq-quet at
Tue Nov 23 20:19:08 CET 2004

I posted the following puzzle to sci.math and rec.puzzles:

My reason for posting this email to is that I wonder,
what is the sequence of lowest possible integers when n=1,2,3,...?

For example, a(4) = 23.

And another sequence might be,
what if we allow non-coprime integers in the diagonals (we concern 
ourselves only with the rows and columns)?

Leroy Quet

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