A113958 Triangular numbers that can be written as sum of two positive cubes.

28, 91, 351, 2926, 8001, 46971, 58653, 93528, 97461, 141778, 300700, 365085, 382375, 398278, 874503, 1295245, 1669878, 3425653, 4117015, 7517503, 7657741, 7771653, 9415630, 9598771

Offset: 1

Author

Reinhard Zumkeller, Jun 03 2006

Keywords

• nonn

Comments

Intersection of A003325 and A000217.

Examples

			91 = 13*(13+1)/2 = 4^3 + 3^3, therefore 91 is a term.
		

Links

• Donovan Johnson, Table of n, a(n) for n = 1..5122
• Index entries for sequences related to sums of cubes

Crossrefs

Cf. A000217, A000578, A003108, A003325, A119977.

Programs

Mathematica

Sort[Select[Total/@Subsets[Range[300]^3,{2}],OddQ[Sqrt[8#+1]]&]] (* Harvey P. Dale, Oct 10 2014 *)