A342894 Smallest number that is the sum of four positive n-th powers in three ways.

28, 1225, 16578, 1479604544, 1885800643779

Offset: 2

Author

N. J. A. Sloane, Apr 04 2021

Keywords

• nonn
• more

Examples

			a(2) = 28 = 1+1+1+25 = 4+4+4+16 = 1+9+9+9.
		

Links

• 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.

Crossrefs

Cf. A230563, A342893-A342903.

Extensions

a(5)-a(6) from Jinyuan Wang, Apr 10 2021