The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A080540

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Number of neutrons in longest known radioactive decay series ending with Lead 209, reversed.
(history; published version)

#3 by Russ Cox at Fri Mar 30 18:41:15 EDT 2012

AUTHOR

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

Discussion

Fri Mar 30

18:41

OEIS Server: https://oeis.org/edit/global/233

#2 by N. J. A. Sloane at Sat Nov 10 03:00:00 EST 2007

COMMENTS

See comments in A080532, protons . Protons are in A080536.

KEYWORD

nonn,hard,new

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

Number of neutrons in longest known radioactive decay series ending with Lead 209, reversed.

DATA

127, 126, 128, 130, 132, 134, 136, 137, 139, 141, 142, 144, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163

OFFSET

0,1

COMMENTS

See comments in A080532, protons are in A080536.

LINKS

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

FORMULA

a(n)=A080532(n)-A080536(n).

CROSSREFS

KEYWORD

nonn,hard

AUTHOR

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

STATUS

approved