A 19 tone meantone synchronous temperament

These things can be done with 19 tones as well:

Scale

[1, 1629949/1564912, 105225/97807, 437333/391228, 1820547/1564912,
117320/97807, 244227/195614, 4067203/3129824, 261813/195614,
545187/391228, 140590/97807, 146420/97807, 1218627/782456,
156588/97807, 653041/391228, 2720323/1564912, 175520/97807,
730173/391228, 188100/97807, 2]

Beat ratios:

[-1, -1, -1, -1, 1, -1, -1, 31104/292751, -1, -1, -1, -1, 1, -1, -1,
1, -1, -1, -1]