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A090782
Numbers that can be expressed as the difference of the squares of primes in just three distinct ways.
24
120, 168, 312, 408, 480, 552, 600, 672, 720, 1008, 1200, 1800, 2160, 2472, 2832, 2880, 3312, 3672, 4560, 5040, 5640, 6120, 6480, 6528, 7248, 7320, 7752, 7872, 8160, 8352, 8400, 8712, 8880, 9048, 9768, 9960, 10032, 10200, 10320, 10488, 10608, 10848
OFFSET
1,1
EXAMPLE
120 = 13^2-7^2 = 17^2-13^2 = 31^2-29^2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray Chandler, Feb 14 2004
STATUS
approved