A080535 Number of protons in longest known radioactive decay series ending with Lead 208 ("thorium series"), reversed.

82, 81, 83, 82, 84, 86, 88, 87, 89, 88, 90, 92, 94, 96, 98, 100, 101, 103, 105, 107, 109, 111

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