A342897 Smallest number that is the sum of three positive n-th powers in four ways.

129, 13896, 5978882

Offset

2,1

Links

Table of n, a(n) for n=2..4.

R. Alter, Computations and generalizations on a remark of Ramanujan, pp. 182-196 of "Analytic Number Theory (Philadelphia, 1980)", ed. M. I. Knopp, Lect. Notes Math., Vol. 899, 1981.

Example

a(2) = 129 = 1+64+64 = 4+4+121 = 16+49+64 = 4+25+100.

Crossrefs

Cf. A230563, A342893-A342903.

Sequence in context: A168067 A232034 A334360 * A239824 A264370 A196752

Adjacent sequences: A342894 A342895 A342896 * A342898 A342899 A342900

Keyword

nonn,bref,more

Author

N. J. A. Sloane, Apr 04 2021

Status

approved