A342893 Smallest number that is the sum of three positive n-th powers in three ways.

54, 5104, 811538

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) = 54 = 1+4+49 = 4+25+25 = 9+9+36.

Crossrefs

Cf. A230563, A342894-A342903.

Sequence in context: A291071 A254620 A299862 * A007761 A178633 A369701

Adjacent sequences: A342890 A342891 A342892 * A342894 A342895 A342896

Keyword

nonn,bref,more

Author

N. J. A. Sloane, Apr 03 2021

Status

approved