A090784 Numbers that can be expressed as the difference of the squares of consecutive primes in just two distinct ways.

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

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 * A291805 A266345 A143741

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