A219728 Squares of the form x^3 + 2*y^3, with x, y > 0.

81, 5041, 5184, 10000, 46225, 59049, 77841, 83521, 322624, 331776, 640000, 685584, 707281, 1265625, 2958400, 3157729, 3418801, 3674889, 3779136, 4157521, 4981824, 5345344, 5602689, 5736025, 7290000, 9150625, 9529569, 10725625, 12257001, 14776336, 15904144

Offset

1,1

Comments

Subsequence of A219726.

Links

Donovan Johnson, Table of n, a(n) for n = 1..1000

Example

81: (x = 3, y = 3), 5041: (x = 17,  y = 4).

Mathematica

With[{nn=300}, Select[Flatten[Table[x^3+2y^3, {x, nn}, {y, nn}]], IntegerQ[ Sqrt[#]]&]//Union] (* Harvey P. Dale, Oct 24 2018 *)

Crossrefs

Cf. A173587, A219722, A219725, A219726.

Sequence in context: A232952 A205285 A222166 * A187454 A206406 A238172

Adjacent sequences: A219725 A219726 A219727 * A219729 A219730 A219731

Keyword

nonn

Author

Zak Seidov, Nov 26 2012

Status

approved