I also ran the (p=1333 x=18 c=8) line and got the same results except this time the two factors are 12 apart. The formulas are 31+2*iteration and 43+2*iteration.
And again the top end of the data.
Now at this point I had gone off my picture and I had brute force checked each line until I had hit 1333. I suspected that there were more exclusion lines and H. Rudd’s website confirmed that there were, however I didn’t know where they were. It was time to write another program.