So here's something interesting:
The numbers which cannot be expressed as the sum of three squares are of this form: (4^x)*(7+8n), for x and n positive integers.
I'm trying to have Mathematica generate an ordered list of these numbers up to, say, a thousand (just as an example). I can get it to generate numbers like this:
Table[(4^x) (7 + 8 n), {x, 0, 2}, {n, 0, 5}]
The output is this:
{{7, 15, 23, 31, 39, 47}, {28, 60, 92, 124, 156, 188}, {112, 240, 368, 496, 624, 752}}
Which seems to be three lists of six things, which makes sense. The thing is if I use Sort to sort these, it sorts the individual lists, which are already sorted. How can I put these lists together and sort them (without doing it manually?)
Sorry if this is too basic to be asked here.
