Numerical hammagraphy is used to determine the statistical distribution of knots which are confined to a thin layer. The statistics used are based on more than 2*106 knots. Among various striking features is a marked regularity in the occurrence of the prime knots.
Michels, J. P. J., & Wiegel, F. W. (1990). The distribution of Alexander polynomials of knots confined to a thin layer. Journal of physics A: mathematical and general, 22(13), 2393-2398. https://doi.org/10.1088/0305-4470/22/13/032