A374230 a(n) is the smallest number which can be represented as the sum of four distinct n-th powers of primes in exactly n ways, or -1 if no such number exists.

17, 423, 435888, 199898912404

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Example

a(2) = 423 = 2^2 + 3^2 + 7^2 + 19^2 = 2^2 + 3^2 + 11^2 + 17^2.

Crossrefs

Cf. A349764, A374228, A374229.

Sequence in context: A114357 A142997 A330528 * A134940 A196676 A027404

Adjacent sequences: A374227 A374228 A374229 * A374231 A374232 A374233

Keyword

nonn,hard,more

Author

Ilya Gutkovskiy, Jul 01 2024

Status

approved