A080538 Number of neutrons in longest known radioactive decay series ending with Lead 207 ("actinium series"), reversed.

125, 126, 128, 129, 131, 132, 134, 136, 138, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161

Offset

0,1

Comments

See comments in A080530, protons are in A080534.

Links

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

C. Heilman, The Pictorial Periodic Table

Formula

a(n)=A080530(n)-A080534(n).

Crossrefs

Cf. A080537, A080539, A080540.

Sequence in context: A030678 A028939 A195420 * A104233 A046759 A115938

Adjacent sequences: A080535 A080536 A080537 * A080539 A080540 A080541

Keyword

nonn,hard

Author

Ralf Stephan, Feb 20 2003

Status

approved