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A090784 Numbers that can be expressed as the difference of the squares of consecutive primes in just two distinct ways. 4
72, 120, 168, 312, 408, 552, 600, 768, 792, 912, 1032, 2472, 3048, 3192, 3288, 3528, 3720, 4008, 5160, 5208, 5808, 5928, 6072, 6480, 6792, 6840, 7080, 7152, 7248, 7512, 7728, 7800, 8520, 8760, 9072, 11400, 11880, 11928, 12792, 13200, 13320, 13440 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

EXAMPLE

72=19^2-17^2=11^2-7^2

CROSSREFS

Cf. A078667, A090783, A090785, A091878.

Sequence in context: A251124 A169644 A078667 * A266345 A143741 A227166

Adjacent sequences:  A090781 A090782 A090783 * A090785 A090786 A090787

KEYWORD

nonn

AUTHOR

Ray G. Opao, Feb 08 2004

EXTENSIONS

More terms from Ray Chandler, Feb 11 2004

STATUS

approved

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Last modified May 27 11:51 EDT 2017. Contains 287205 sequences.