A155960 Squares which can be expressed as the sum of two positive cubes in at least 3 ways.

11177126654841000000, 715336105909824000000, 8148125331379089000000

Offset

1,1

Links

Table of n, a(n) for n=1..3.

Uwe Hollerbach, Taxi, Taxi! [Original link, broken]

Uwe Hollerbach, Taxi, Taxi! [Replacement link to Wayback Machine]

Uwe Hollerbach, Taxi! Taxi! [Cached copy from Wayback Machine, html version of top page only]

Formula

a(n) = A155961(n)^2.

Example

a(1) = 279300^3 + 2234400^3 = 790020^3 + 2202480^3 = 1256850^3 + 2094750^3. - Jean-François Alcover, Jul 03 2017

Crossrefs

Cf. A051302, A155961.

Sequence in context: A364363 A215876 A095435 * A266961 A238359 A253389

Adjacent sequences: A155957 A155958 A155959 * A155961 A155962 A155963

Keyword

nonn,hard,bref,more

Author

Ray Chandler, Jan 31 2009

Status

approved