A092006 Numbers that can be expressed as the difference of the squares of primes in exactly ten distinct ways.

21840, 43680, 57120, 73080, 87360, 101640, 127512, 128520, 130200, 162792, 173712, 181608, 184800, 196560, 200928, 221760, 229320, 231840, 240240, 271320, 290472, 310128, 327600, 350280, 370272, 426360, 442680, 461472, 471240, 494760

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Example

21840 = 149^2-19^2 = 151^2-31^2 = 157^2-53^2 = 179^2-101^2 =
223^2-167^2 = 281^2-239^2 = 379^2-349^2 = 467^2-443^2 = 787^2-773^2 =
1097^2-1087^2

Crossrefs

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

Sequence in context: A185863 A265614 A265139 * A034623 A069312 A022206

Adjacent sequences: A092003 A092004 A092005 * A092007 A092008 A092009

Keyword

nonn

Author

Ray Chandler, Feb 22 2004

Status

approved