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A342897 Smallest number that is the sum of three positive n-th powers in four ways. 1
129, 13896, 5978882 (list; graph; refs; listen; history; text; internal format)
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

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Last modified August 9 15:33 EDT 2022. Contains 356026 sequences. (Running on oeis4.)