A092013 Numbers that can be expressed as the difference of the squares of primes in exactly seventeen distinct ways.

185640, 212520, 286440, 328440, 360360, 414960, 425040, 1099560, 1273272, 1526280, 1633632, 2090088, 2635248, 3124968, 3825360, 4461072, 4740120, 4758600, 5213208, 6240360, 7086240, 8251320, 8539440, 9064440, 9129120

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Example

185640 = 431^2-11^2 = 433^2-43^2 = 443^2-103^2 = 487^2-227^2 =
509^2-271^2 = 547^2-337^2 = 557^2-353^2 = 601^2-419^2 = 631^2-461^2 =
733^2-593^2 = 1229^2-1151^2 = 1361^2-1291^2 = 1811^2-1759^2 = 3109^2-3079^2
= 3329^2-3301^2 = 3583^2-3557^2 = 15473^2-15467^2

Crossrefs

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

Sequence in context: A117225 A032748 A180099 * A186878 A192103 A203442

Adjacent sequences: A092010 A092011 A092012 * A092014 A092015 A092016

Keyword

nonn

Author

Ray Chandler, Feb 22 2004

Status

approved