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A080535 Number of protons in longest known radioactive decay series ending with Lead 208 ("thorium series"), reversed. 5
82, 81, 83, 82, 84, 86, 88, 87, 89, 88, 90, 92, 94, 96, 98, 100, 101, 103, 105, 107, 109, 111 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See comments in A080531, neutrons are in A080539.

LINKS

Table of n, a(n) for n=0..21.

C. Heilman, The Pictorial Periodic Table

FORMULA

a(n)=A080531(n)-A080539(n).

CROSSREFS

Cf. A080533, A080534, A080536.

Sequence in context: A038008 A080533 A080534 * A080536 A043632 A296880

Adjacent sequences:  A080532 A080533 A080534 * A080536 A080537 A080538

KEYWORD

nonn,hard

AUTHOR

Ralf Stephan, Feb 20 2003

STATUS

approved

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Last modified October 24 17:11 EDT 2021. Contains 348233 sequences. (Running on oeis4.)