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%I #2 Mar 30 2012 18:41:15
%S 82,81,80,82,81,83,82,84,86,88,90,92,94,96,97,99,101,103,105,107,109
%N Number of protons in longest known radioactive decay series ending with Lead 206 ("uranium series"), reversed.
%C See comments in A080529, neutrons are in A080537.
%H C. Heilman, <a href="http://chemlab.pc.maricopa.edu/periodic/periodic.html">The Pictorial Periodic Table</a>
%F a(n)=A080529(n)-A080537(n).
%Y Cf. A080534, A080535, A080536.
%K nonn,hard
%O 0,1
%A _Ralf Stephan_, Feb 20 2003
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