A365506 - OEIS

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A365506

a(n) is the smallest perfect power that can be represented as the sum of n distinct perfect powers in exactly n ways, or -1 if no such number exists.

0

1, 36, 125, 81, 128

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

Eric Weisstein's World of Mathematics, Perfect Power.

EXAMPLE

For n = 2: 36 = 6^2 and 36 = 2^2 + 2^5 = 3^2 + 3^3.

CROSSREFS

Cf. A001597, A363040.

Sequence in context: A223506 A238037 A238032 * A250625 A057837 A352316

Adjacent sequences: A365503 A365504 A365505 * A365507 A365508 A365509

KEYWORD

nonn,more

AUTHOR

Ilya Gutkovskiy, Sep 07 2023

STATUS

approved