A374804 a(n) is the smallest number which can be represented as the sum of 4 distinct nonzero sixth powers in exactly n ways, or -1 if no such number exists.

4890, 160426515, 1885800643779

Offset

1,1

Links

Table of n, a(n) for n=1..3.

Example

a(2) = 160426515 = 1^6 + 3^6 + 19^6 + 22^6 = 1^6 + 10^6 + 15^6 + 23^6.
a(3) = 1885800643779 = 1^6 + 34^6 + 49^6 + 111^6 = 7^6 + 43^6 + 69^6 + 110^6 = 18^6 + 25^6 + 77^6 + 109^6.

Crossrefs

Cf. A025417, A025421, A374696, A374803.

Sequence in context: A206273 A086127 A126704 * A251325 A186478 A220059

Adjacent sequences: A374801 A374802 A374803 * A374805 A374806 A374807

Keyword

nonn,bref,more

Author

Ilya Gutkovskiy, Jul 20 2024

Status

approved