A092008 Numbers that can be expressed as the difference of the squares of primes in exactly twelve distinct ways.

55440, 57960, 94248, 157080, 371280, 394680, 404040, 414120, 447720, 502320, 560280, 572880, 578760, 583440, 619080, 656880, 742560, 756840, 777480, 906360, 939120, 963480, 988680, 1033032, 1053360, 1056720, 1062600, 1088472, 1096680

Offset

1,1

Links

Table of n, a(n) for n=1..29.

Example

55440 = 239^2-41^2 = 257^2-103^2 = 283^2-157^2 = 307^2-197^2 =
353^2-263^2 = 359^2-271^2 = 421^2-349^2 = 523^2-467^2 = 1549^2-1531^2 =
1987^2-1973^2 = 2777^2-2767^2 = 3469^2-3461^2

Crossrefs

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

Sequence in context: A253148 A204776 A237485 * A190384 A217692 A061740

Adjacent sequences: A092005 A092006 A092007 * A092009 A092010 A092011

Keyword

nonn

Author

Ray Chandler, Feb 22 2004

Status

approved