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A080532
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Number of nucleons in longest known radioactive decay series ending with Lead 209, reversed.
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5
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209, 209, 209, 213, 217, 221, 225, 225, 229, 233, 233, 237, 237, 241, 245, 249, 253, 257, 261, 265, 269, 273
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OFFSET
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0,1
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COMMENTS
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The numbers are all == 1 mod 4. The sequence was submitted reversed, as it is open in the past. It is unknown if reversed decay series are finite (the "island of stability" hypothesis).
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn,hard
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AUTHOR
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STATUS
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approved
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