Project Euler Forum

Ah, of course - being such a non-intuitive condition for (p, q, r), I totally neglected it. Anyway, I solved it now, thank you!

This is a very nice problem, which I thought I had solved. But... I have a total of 508 triangles for the original limit L = 120000. Total sum is 8 digits, starts with a 3. If I lower it to 12000 I get only 38 triangles, total sum 251752. What's wrong ?? =\ ... I get exactly the same problem. daniel...

I get the correct answer for 10^5, but not for 10^12. I guess it could have something to do with low integer precision. Are the following values correct?

10^6: 700738
10^8: 171436696
10^10: 23261047907

I just found the annoyingly trivial and almost invisible mistake in my code, and finally got the correct answer.

It seems I can't get it right... I get the correct results for D(4) and D(5). Then D(6) = 76 and D(10) = 2147. Are these values correct?