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A080534 Number of protons in longest known radioactive decay series ending with Lead 207 ("actinium series"), reversed. 5
82, 81, 83, 82, 84, 83, 85, 87, 89, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See comments in A080530, neutrons are in A080538.

LINKS

Table of n, a(n) for n=0..20.

C. Heilman, The Pictorial Periodic Table

FORMULA

a(n)=A080530(n)-A080538(n).

CROSSREFS

Cf. A080533, A080535, A080536.

Sequence in context: A143757 A038008 A080533 * A080535 A080536 A043632

Adjacent sequences:  A080531 A080532 A080533 * A080535 A080536 A080537

KEYWORD

nonn,hard

AUTHOR

Ralf Stephan, Feb 20 2003

STATUS

approved

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Last modified December 1 16:07 EST 2021. Contains 349430 sequences. (Running on oeis4.)