login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

See comments in A080530, protons are in A080534.

LINKS

C. Heilman, The Pictorial Periodic Table

FORMULA

a(n)=A080530(n)-A080534(n).

CROSSREFS

Cf. A080537, A080539, A080540.

Sequence in context: A030678 A028939 A195420 * A104233 A046759 A115938

Adjacent sequences:  A080535 A080536 A080537 * A080539 A080540 A080541

KEYWORD

nonn,hard

AUTHOR

Ralf Stephan (ralf(AT)ark.in-berlin.de), Feb 20 2003

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 14:37 EST 2012. Contains 205930 sequences.