A092011 Numbers that can be expressed as the difference of the squares of primes in exactly fifteen distinct ways.

207480, 267960, 535920, 542640, 614040, 652080, 674520, 720720, 950040, 1178520, 1197840, 1256640, 1321320, 1324680, 1356600, 1369368, 1441440, 1459920, 1510320, 1543080, 1691760, 1727880, 1802640, 1900080, 1984920, 2088240

Offset

1,1

Links

Table of n, a(n) for n=1..26.

Example

207480 = 457^2-37^2 = 461^2-71^2 = 463^2-83^2 = 467^2-103^2 =
523^2-257^2 = 599^2-389^2 = 661^2-479^2 = 743^2-587^2 = 863^2-733^2 =
967^2-853^2 = 1277^2-1193^2 = 1759^2-1699^2 = 2749^2-2711^2 = 3719^2-3691^2
= 51871^2-51869^2

Crossrefs

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

Sequence in context: A082176 A178285 A101701 * A362758 A216900 A072679

Adjacent sequences: A092008 A092009 A092010 * A092012 A092013 A092014

Keyword

nonn

Author

Ray Chandler, Feb 22 2004

Status

approved