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A080529 Number of nucleons in longest known radioactive decay series ending with Lead 206 ("uranium series"), reversed. 5
206, 206, 206, 210, 210, 214, 214, 218, 222, 226, 230, 234, 238, 242, 242, 246, 250, 254, 258, 262, 266 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
The numbers are all equivalent to 2 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).
LINKS
FORMULA
a(n)=A080533(n)+A080537(n).
CROSSREFS
Sequence in context: A188447 A252278 A252271 * A261749 A058180 A025351
KEYWORD
nonn,hard
AUTHOR
Ralf Stephan, Feb 20 2003
STATUS
approved

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Last modified September 14 09:15 EDT 2024. Contains 375921 sequences. (Running on oeis4.)