Function permutations64

libraries/statHelpers/statHelpers.cpp:28–36

uint64_t permutations64(uint8_t n, uint8_t k)
{
  uint64_t rv = 1;
  for (uint8_t i = n; i > (n - k); i--)
  {
    rv *= i;
  }
  return rv;
}


//  can be optimized similar to dfactorial