5 2斷食

1 2 3 1 12 proof numberphile 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 n n n 1 2 proof 1 1 1 1 1 1x0 1 1 2 3 4 5 to n 1 2 3 4 numbers in english 1 2 3 4 5 n formula 1 2 2 2 3 2 n 2 n n 1 2n 1 6

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