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 A213983 Smallest integer x >= 0 satisfying x^2 - y^2 = n^3. 0
 0, 1, 3, 6, 8, 15, 15, 28, 24, 27, 35, 66, 42, 91, 63, 60, 64, 153, 81, 190, 90, 105, 143, 276, 118, 125, 195, 162, 154, 435, 165, 496, 192, 209, 323, 210, 216, 703, 399, 260, 253, 861, 273, 946, 297, 309, 575, 1128, 336, 343, 375, 374, 377, 1431, 405, 440 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS 33 is the smallest odd number with the property that n does not divide a(n). LINKS MATHEMATICA lst = {}; Do[y = 0; While[True, s = Last@Last@Reduce[x^2 - y^2 == n^3, x]; If[IntegerQ[s], Break[]]; y++]; AppendTo[lst, s], {n, 55}]; Prepend[lst, 0] CROSSREFS Sequence in context: A263349 A297211 A274605 * A174133 A261928 A246141 Adjacent sequences:  A213980 A213981 A213982 * A213984 A213985 A213986 KEYWORD nonn AUTHOR Arkadiusz Wesolowski, Jun 30 2012 STATUS approved

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Last modified January 24 10:33 EST 2020. Contains 331193 sequences. (Running on oeis4.)