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A092000 Numbers that can be expressed as the difference of the squares of primes in exactly four distinct ways. +0
22
240, 792, 912, 1248, 2040, 2280, 2760, 3528, 3720, 3960, 4080, 4440, 4680, 4872, 5160, 5520, 5880, 6600, 6720, 6960, 7080, 8520, 8568, 8760, 9072, 9120, 9672, 9912, 10248, 10440, 11088, 11592, 11832, 11880, 12408, 12480, 12720, 13200, 13560 (list; graph; listen)
OFFSET

1,1

EXAMPLE

240 = 17^2-7^2 = 19^2-11^2 = 23^2-17^2 = 61^2-59^2

CROSSREFS

Cf. A090781, A090782, A090788, A092001-A092020.

Sequence in context: A070123 A119659 A060663 this_sequence A124352 A049335 A004009

Adjacent sequences: A091997 A091998 A091999 this_sequence A092001 A092002 A092003

KEYWORD

nonn

AUTHOR

Ray Chandler (rayjchandler(AT)sbcglobal.net), Feb 22 2004

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.


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