OFFSET
1,1
COMMENTS
For the corresponding term y1(n) see A255246(n).
The present solutions of this first class are the smallest positive ones.
FORMULA
EXAMPLE
The first pairs [x1(n), y1(n)] of the fundamental positive solutions of this first class are
(the prime A038873(n) is listed as first entry):
[2,[4, 3]], [7, [1, 2]], [17, [1, 3]],
[23, [3, 4]], [31, [1, 4]], [41, [3, 5]],
[47, [5, 6]], [71, [1, 6]], [73, [5, 7]],
[79, [7, 8]], [89, [3, 7]], [97, [1, 7]],
[103, [5, 8]], [113, [7, 9]], [127, [1, 8]],
[137, [5, 9]], [151, [7, 10]], [167, [11, 12]], [191, [3, 10]], [193, [7, 11]], [199, [1, 10]], [223, [13, 14]], [233, [3, 11]], [239, [7, 12]], [241, [1, 11]], [257, [9, 13]], [263, [5, 12]], ...
n=1: 4^2 - 2*3^2 = -2 = -A038873(1),
n=2: 1^2 - 2*2^2 = 1 - 8 = -7 = -A038873(2).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Feb 25 2015
EXTENSIONS
More terms from Colin Barker, Feb 26 2015
STATUS
approved