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A080538
Number of neutrons in longest known radioactive decay series ending with Lead 207 ("actinium series"), reversed.
5
125, 126, 128, 129, 131, 132, 134, 136, 138, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161
OFFSET
0,1
COMMENTS
See comments in A080530, protons are in A080534.
FORMULA
a(n)=A080530(n)-A080534(n).
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Ralf Stephan, Feb 20 2003
STATUS
approved