%I #2 Mar 30 2012 18:41:15
%S 126,127,129,130,132,134,136,137,139,140,142,144,146,148,150,152,151,
%T 153,155,157,159
%N Number of neutrons in longest known radioactive decay series ending with Lead 208 ("thorium series"), reversed.
%C See comments in A080531, protons are in A080535.
%H C. Heilman, <a href="http://chemlab.pc.maricopa.edu/periodic/periodic.html">The Pictorial Periodic Table</a>
%F a(n)=A080531(n)-A080535(n).
%Y Cf. A080537, A080538, A080540.
%K nonn,hard
%O 0,1
%A _Ralf Stephan_, Feb 20 2003
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