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Showing content from https://en.cppreference.com/w/cpp/language/../numeric/random/seed_seq.html below:

std::seed_seq - cppreference.com

class seed_seq;

(since C++11)

std::seed_seq consumes a sequence of integer-valued data and produces a requested number of 32-bit unsigned integer values, based on the consumed data. The produced values are distributed over the entire 32-bit range even if the consumed values are close.

It provides a way to seed a large number of random number engines or to seed a generator that requires a lot of entropy, given a small seed or a poorly distributed initial seed sequence.

std::seed_seq meets the requirements of SeedSequence.

[edit] Nested types [edit] Data members Member Description std::vector<result_type> v the underlying seed sequence
(exposition-only member object*) [edit] Member functions constructs and seeds the std::seed_seq object
(public member function) std::seed_seq is not assignable
(public member function) calculates the bias-eliminated, evenly distributed 32-bit values
(public member function) obtains the number of stored 32-bit values
(public member function) copies all stored 32-bit values
(public member function) [edit] Example

#include <cstdint>
#include <iostream>
#include <random>
 
int main()
{
    std::seed_seq seq{1, 2, 3, 4, 5};
    std::vector<std::uint32_t> seeds(10);
    seq.generate(seeds.begin(), seeds.end());
    for (std::uint32_t n : seeds)
        std::cout << n << '\n';
}

Possible output:

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