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A080536 Number of protons in longest known radioactive decay series ending with Lead 209, reversed. 5

%I

%S 82,83,81,83,85,87,89,88,90,92,91,93,92,94,96,98,100,102,104,106,108,

%T 110

%N Number of protons in longest known radioactive decay series ending with Lead 209, reversed.

%C See comments in A080532, neutrons are in A080540.

%H C. Heilman, <a href="http://chemlab.pc.maricopa.edu/periodic/periodic.html">The Pictorial Periodic Table</a>

%F a(n)=A080532(n)-A080540(n).

%Y Cf. A080533, A080534, A080535.

%K nonn,hard

%O 0,1

%A _Ralf Stephan_, Feb 20 2003

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Last modified November 28 04:31 EST 2021. Contains 349400 sequences. (Running on oeis4.)