ID {4,2,1}
n=3 → {..,4, 2, 1...}
n=4 → {..,4, 2, 1...}
n=5 → {..,4, 2, 1...}
n=6 → {..,4, 2, 1...}
n=7 → {..,4, 2, 1...}
n=8 → {..,4, 2, 1...}
®700400329590
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If the number is even, divide it by two | If the number is odd, triple it and add one
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