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A261522 Positive integers n such that x^2 - 23xy + y^2 + n = 0 has integer solutions. 0
21, 41, 59, 75, 84, 89, 101, 111, 119, 125, 129, 131, 164, 189, 201, 236, 251, 269, 300, 311, 329, 336, 356, 369, 381, 404, 419, 425, 444, 461, 476, 479, 489, 500, 509, 516, 521, 524, 525, 531, 579, 581, 629, 656, 675, 719, 731, 756, 761, 801, 804, 831, 839 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

EXAMPLE

41 is in the sequence because x^2 - 23xy + y^2 + 41 = 0 has integer solutions, for example (x, y) = (2, 45).

CROSSREFS

Cf. A004253 (n = 75), A237254 (n = 125).

Cf. A031363, A237350, A237351, A237599, A237606, A237609, A237610, A236330, A236331, A238240, A238245.

Sequence in context: A070666 A320775 A104393 * A215145 A154576 A173960

Adjacent sequences:  A261519 A261520 A261521 * A261523 A261524 A261525

KEYWORD

nonn

AUTHOR

Colin Barker, Aug 23 2015

STATUS

approved

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Last modified November 12 21:22 EST 2019. Contains 329079 sequences. (Running on oeis4.)