The side lengths of a
Heronian Triangle are R1, R and R+1, where R is an 8digit positive integer which does not contain any leading zero.
Determine all possible value(s) of R for which this is possible.
The wikipedia article for Equilateral Triangle has a section for Almost Equilateral Heronian Triangles with a link to the integer sequence http://www.research.att.com/~njas/sequences/A003500
This entry even gives the formula derived by Jim K. The only 8 digit number is
27246964

Posted by Jer
on 20091116 15:11:19 