A003826 Numbers that are the sum of two cubes in at least four ways (primitive solutions).

6963472309248, 12625136269928, 21131226514944, 26059452841000, 74213505639000, 95773976104625, 159380205560856, 174396242861568, 300656502205416, 376890885439488, 521932420691227, 573880096718136

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

References

• R. K. Guy, Unsolved Problems in Number Theory, D1.

Links

• Uwe Hollerbach, Table of n, a(n) for n = 1..664
• Uwe Hollerbach, Taxi, Taxi! [Original link, broken]; see also Archive.org backup and local cache [top page only]
• E. Rosenstiel et al., The Four Least Solutions ..., Instit. of Mathem. and Its Applic. Bull. Jul 27 (pp. 155-157) 1991
• Eric Weisstein's World of Mathematics, Cubic Number
• Eric Weisstein's World of Mathematics, Diophantine Equation--3rd Powers
• David W. Wilson, The Fifth Taxicab Number is 48988659276962496, J. Integer Sequences, Vol. 2, 1999, #99.1.9.

Crossrefs

Cf. A011541, A023050, A023051, A001235.

Extensions

More terms from David W. Wilson, Oct 15 1997

b-file extended by Ray Chandler, Jan 19 2009