I'm looking at the page at this URL:

https://matplotlib.org/gallery/images_contours_and_fields/irregulardatagrid.html#sphx-glr-gallery-images-contours-and-fields-irregulardatagrid-py

What is the significance of the number 14 in calls to contour and tricontour? (I know that this is a lucky number of have at table, but am wondering if there is some other reason for this value).