A092009 Numbers that can be expressed as the difference of the squares of primes in exactly thirteen distinct ways.

236208, 316680, 480480, 644280, 750120, 757680, 792120, 822120, 822360, 896280, 925680, 1015560, 1025640, 1044120, 1067640, 1129128, 1136520, 1255800, 1274280, 1299480, 1391280, 1484280, 1487640, 1489488, 1572648, 1616160, 1707888

Offset

1,1

Links

Table of n, a(n) for n=1..27.

Example

236208 = 487^2-31^2 = 547^2-251^2 = 577^2-311^2 = 643^2-421^2 =
787^2-619^2 = 853^2-701^2 = 2137^2-2081^2 = 2833^2-2791^2 = 4933^2-4909^2 =
8443^2-8429^2 = 14767^2-14759^2 = 19687^2-19681^2 = 59053^2-59051^2

Crossrefs

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

Sequence in context: A254257 A254303 A269280 * A160920 A235105 A205411

Adjacent sequences: A092006 A092007 A092008 * A092010 A092011 A092012

Keyword

nonn

Author

Ray Chandler, Feb 22 2004

Status

approved