A092012 Numbers that can be expressed as the difference of the squares of primes in exactly sixteen distinct ways.

175560, 341880, 408408, 545160, 600600, 656040, 840840, 912912, 942480, 954408, 1007160, 1302840, 1350888, 1367520, 1442280, 1609608, 2457840, 2492280, 3243240, 3651648, 3797640, 3982440, 4212600, 4370520, 4440072, 4775232

Offset

1,1

Links

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

Example

175560 = 421^2-41^2 = 431^2-101^2 = 439^2-131^2 = 463^2-197^2 =
499^2-271^2 = 523^2-313^2 = 557^2-367^2 = 853^2-743^2 = 1193^2-1117^2 =
1493^2-1433^2 = 2017^2-1973^2 = 2111^2-2069^2 = 6277^2-6263^2 =
7321^2-7309^2 = 14633^2-14627^2 = 43891^2-43889^2

Crossrefs

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

Sequence in context: A224253 A252843 A173705 * A224650 A262822 A273727

Adjacent sequences: A092009 A092010 A092011 * A092013 A092014 A092015

Keyword

nonn

Author

Ray Chandler, Feb 22 2004

Status

approved