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A238240
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Positive integers n such that x^2 - 20xy + y^2 + n = 0 has integer solutions.
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2
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18, 63, 72, 74, 83, 90, 99, 107, 162, 171, 227, 252, 288, 296, 315, 332, 347, 359, 360, 362, 387, 396, 407, 428, 450, 491, 495, 567, 626, 648, 666, 684, 711, 743, 747, 794, 810, 827, 842, 855, 866, 882, 887, 891, 908, 954, 963, 1008, 1031, 1143, 1152, 1163
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OFFSET
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1,1
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LINKS
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EXAMPLE
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63 is in the sequence because x^2 - 20xy + y^2 + 63 = 0 has integer solutions, for example (x, y) = (1, 16).
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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