A300381 Numbers of the form x^3+x*y+y^3 where x,y>0.

3, 11, 20, 31, 41, 63, 69, 80, 103, 131, 143, 144, 167, 209, 223, 236, 261, 275, 304, 351, 365, 371, 391, 435, 468, 503, 521, 536, 563, 601, 608, 677, 735, 739, 755, 776, 783, 829, 899, 911, 999, 1011, 1028, 1057, 1088, 1104, 1135, 1175, 1276, 1313, 1343, 1361, 1391, 1413, 1439, 1511

Offset

1,1

Comments

Contains all terms larger than 1 from A071568 (contributed by y=1).

Links

Table of n, a(n) for n=1..56.

Mathematica

With[{nn=20}, Take[Flatten[Table[x^3+x y+y^3, {x, nn}, {y, nn}]]//Union, 4nn]] (* Harvey P. Dale, Jun 03 2026 *)

Crossrefs

Cf. A003136, A266970 (prime subsequence), A024614.

Sequence in context: A166096 A139220 A139221 * A363012 A006876 A031239

Adjacent sequences: A300378 A300379 A300380 * A300382 A300383 A300384

Keyword

nonn

Author

R. J. Mathar, Mar 04 2018

Status

approved