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A080536 Number of protons in longest known radioactive decay series ending with Lead 209, reversed. 5
82, 83, 81, 83, 85, 87, 89, 88, 90, 92, 91, 93, 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 A080532, neutrons are in A080540.

LINKS

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

C. Heilman, The Pictorial Periodic Table

FORMULA

a(n)=A080532(n)-A080540(n).

CROSSREFS

Cf. A080533, A080534, A080535.

Sequence in context: A080533 A080534 A080535 * A043632 A296880 A077684

Adjacent sequences:  A080533 A080534 A080535 * A080537 A080538 A080539

KEYWORD

nonn,hard

AUTHOR

Ralf Stephan, Feb 20 2003

STATUS

approved

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Last modified October 24 16:47 EDT 2021. Contains 348233 sequences. (Running on oeis4.)