login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A080539 Number of neutrons in longest known radioactive decay series ending with Lead 208 ("thorium series"), reversed. 5

%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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)