Utilities Matrix TimesTable [ravel].sm (14,37 KiB) descargado 1208 vez(es).

This data set is erroneous from source ... OK: visible.
Much populated data set, especially imported may contain typos.
Here, ravel(M) detects the typo error.
I know no other method to sanity/proof data set.

Utilities Matrix TimesTable [ravel].sm (110,07 KiB) descargado 1131 vez(es).