login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A113958 Triangular numbers that can be written as sum of two positive cubes. 4
28, 91, 351, 2926, 8001, 46971, 58653, 93528, 97461, 141778, 300700, 365085, 382375, 398278, 874503, 1295245, 1669878, 3425653, 4117015, 7517503, 7657741, 7771653, 9415630, 9598771 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Intersection of A003325 and A000217.

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..5122

Index entries for sequences related to sums of cubes

EXAMPLE

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

MATHEMATICA

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

CROSSREFS

Cf. A119977, A003108, A000578.

Sequence in context: A164689 A065655 A272399 * A219815 A044215 A044596

Adjacent sequences:  A113955 A113956 A113957 * A113959 A113960 A113961

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 03 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified October 20 05:42 EDT 2017. Contains 293601 sequences.