Find the rules: first line: 1, second line: 2, 3, third line: 4, 5, 6 According to the above arrangement The third number from left to right in line n (n > = 3) is

Find the rules: first line: 1, second line: 2, 3, third line: 4, 5, 6 According to the above arrangement The third number from left to right in line n (n > = 3) is

The rule is that the last one in the nth row is 1 + 2 + 3 +... + n = n * (n + 1) / 2
So the last one on line n-1 is (n-1) * n / 2
The third number from left to right in the nth row (n > = 3) is (n-1) * n / 2 + 3 = (n ^ 2-N + 6) / 2

Elden Ring Premiere

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