Self numbers: Difference between revisions

I couldn't follow the math in the Wikipedia entry, nor the discussion and code here so far. But an initial expedient of generating a list of all the integers from 1 to just over ten times the required number of results and then deleting those that ''could'' be derived usingby the described method revealed the sequencing pattern on which the code below is based. On the test machine, it completes all three of the tests at the bottom in a total of around a millisecond.