A080534 Number of protons in longest known radioactive decay series ending with Lead 207 ("actinium series"), reversed.

82, 81, 83, 82, 84, 83, 85, 87, 89, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110

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