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@Carlo Beenakker I'm going to have to check my computations. I found 40 coefficients which fit the conditions and no hint that this is all the end. I'll try reading the Mathematica code.
@FedorPetrov I finally understood your question and corrected the problem to read as you have indicated. I would like to think that those extra commas were not put there by me, but by some other well meaning editor.
I removed some commas which didn't belong. I wish that I could see previous versions of this problem to see if those commas were put there by me or by someone else.