This has nothing much to with mathematics, drxx. The subject is a very nerdy one which I (as a mathematician) find very boring, and I do not even possess a calculator. It is worth bearing in mind that the pattern will apply to letters as well as numbers. I will say no more and I might already have overstepped the mark.
I was disappointed by the Oedipus puzzle. The fate of the protagonist was not the loss of an eye (or even two): it was EXILE, and it is this which is explored in Oedipus at Colonus. Near the bottom of the grid you could see the letters of EXILE , but I could not find any way to use them. I cannot help wondering whether Dysart had this in mind, but was unable to implement the idea in time. The interweaving of the two principals was achieved elegantly, as well as the inclusion of sage and victim.
I am not longer submitting solutions - it is not worth the postage -but I shall continue to do the solving, and I would have to spend ages on Google researching films, pop songs, personalities and the like.