A092018 Numbers that can be expressed as the difference of the squares of primes in exactly twenty-two distinct ways.

526680, 2106720, 4037880, 4555320, 4772040, 4924920, 7785960, 9988440, 10330320, 11051040, 11843832, 12525240, 12809160, 13093080, 13933920, 14348040, 15222480, 15513960, 16576560, 19634160, 19677840, 19764360

Offset

1,1

Links

Table of n, a(n) for n=1..22.

Example

526680 = 727^2-43^2 = 733^2-103^2 = 761^2-229^2 = 839^2-421^2 =
863^2-467^2 = 883^2-503^2 = 941^2-599^2 = 1009^2-701^2 = 1123^2-857^2 =
1171^2-919^2 = 1307^2-1087^2 = 1429^2-1231^2 = 1481^2-1291^2 = 1553^2-1373^2
= 1951^2-1811^2 = 2153^2-2027^2 = 3797^2-3727^2 = 6949^2-6911^2 =
7333^2-7297^2 = 9419^2-9391^2 = 11981^2-11959^2 = 14639^2-14621^2

Crossrefs

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

Sequence in context: A036097 A254039 A170802 * A203930 A215999 A219334

Adjacent sequences: A092015 A092016 A092017 * A092019 A092020 A092021

Keyword

nonn

Author

Ray Chandler, Feb 22 2004

Extensions

a(9)-a(22) from Donovan Johnson, Nov 26 2008

Status

approved