For loop

As a sorcerer in the land of numbers, you summon some special numbers, but your magic allows you to stop when the task is complete. This code weaves a spell to gather those unique numbers and reveal the final enchanted outcome.

class LandOfNumbers {

    public int summonSpecialNumbers(int n) {
        int sum = 0;
        for (int i = 1; i <= n * 2; i += 2) {
            sum += i;
        }
        return sum;
    }
}

Describe the functionality of this code for an AI assistant by focusing on its overall purpose and what it achieves, rather than detailing each line. Emphasize the main function and the rules it follows to accomplish its task.