A092002 Numbers that can be expressed as the difference of the squares of primes in exactly six distinct ways.

840, 1320, 1680, 2520, 3192, 3432, 4920, 5208, 5280, 5712, 6552, 6888, 9360, 11928, 16008, 19152, 19992, 25200, 29568, 31080, 35880, 38280, 38640, 40920, 41832, 45240, 47880, 48360, 48720, 51240, 51480, 53040, 56280, 57288, 61320, 63240

Offset: 1

Author

Ray Chandler, Feb 22 2004

Keywords

• nonn

Examples

			840 = 31^2-11^2 = 37^2-23^2 = 41^2-29^2 = 47^2-37^2 = 73^2-67^2 =
107^2-103^2
		

Crossrefs

Cf. A090781, A090782, A090788, A092000-A092020.

Programs

Mathematica

Take[Transpose[Select[Tally[Sort[Last[#]-First[#]&/@(Subsets[ Prime[ Range[ 2000]],{2}]^2)]],Last[#]==6&]][[1]],40] (* Harvey P. Dale, Nov 17 2013 *)