Leyland Numbers

A Leyland number is the number that is of the form x^y + y^x.

8, 17, 32, 54, 57, 100, 145, 
177, 320, 368, 512, 593, 945, 1124, 
1649, 2169, 2530, 4240, 5392, 6250, 7073, 
8361, 16580, 18785, 20412, 23401, 32993, 60049, 
65792, 69632, 93312, 94932, 131361, 178478, 262468, 
268705, 397585, 423393, 524649, 533169, 1048976, 1058576, 
1596520, 1647086, 1941760, 2012174, 4208945, 4785713, 7861953, 
9865625, 10609137, 14352282, 16797952, 33554432, 43050817, 
.......,

On 15 October 2009, this C++ program (leyland.cpp) was written to test if a number is a Leyland number. In addition, leyland.cpp along with this C++ program (format.cpp) were used to generate the list of Leyland numbers used in this nBAB. The program is part of the MBNA (MathBabbler Number Analyst).


Creator: Gerald Thurman [gthurman@gmail.com]
Created: 17 October 2009
+ added 145 on 11 March 2010
+ added 320 on 11 February 2015
+ added 368 on 31 December 2016

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 United States License.