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A092015 Numbers that can be expressed as the difference of the squares of primes in exactly nineteen distinct ways. 0
120120, 513240, 722568, 2348808, 3721872, 4269720, 5442360, 5754840, 6109488, 7549080, 8288280, 9043320, 10986360, 12538680, 13037640, 13813800, 14395920, 15181320, 15408120, 15571920, 15735720, 16151520, 16379160, 16696680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

120120 = 347^2-17^2 = 349^2-41^2 = 353^2-67^2 = 383^2-163^2 =

421^2-239^2 = 463^2-307^2 = 467^2-313^2 = 499^2-359^2 = 521^2-389^2 =

601^2-491^2 = 757^2-673^2 = 1031^2-971^2 = 1181^2-1129^2 = 1451^2-1409^2 =

2017^2-1987^2 = 2741^2-2719^2 = 4297^2-4283^2 = 5011^2-4999^2 =

15017^2-15013^2

CROSSREFS

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

Sequence in context: A043622 A272597 A190378 * A250673 A278005 A237336

Adjacent sequences:  A092012 A092013 A092014 * A092016 A092017 A092018

KEYWORD

nonn

AUTHOR

Ray Chandler, Feb 22 2004

EXTENSIONS

a(13)-a(24) from Donovan Johnson, Nov 26 2008

STATUS

approved

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Last modified June 23 21:09 EDT 2021. Contains 345402 sequences. (Running on oeis4.)