The Yellowstone Permutation - Numberphile

Featuring Neil Sloane. See https://brilliant.org/numberphile for Brilliant and get 20% off their premium service (episode sponsor)
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Correction at 4:08… Neil says “then we get twice 61" instead of “about twice 61". The actual result is 120, not 122 as labelled.
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Yellowstone Permutation and its wonderful geysers: https://oeis.org/A098550

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Видео The Yellowstone Permutation - Numberphile канала Numberphile