A080539 - OEIS

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A080539

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

5

126, 127, 129, 130, 132, 134, 136, 137, 139, 140, 142, 144, 146, 148, 150, 152, 151, 153, 155, 157, 159

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

COMMENTS

See comments in A080531, protons are in A080535.

LINKS

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

C. Heilman, The Pictorial Periodic Table

FORMULA

a(n)=A080531(n)-A080535(n).

CROSSREFS

Cf. A080537, A080538, A080540.

Sequence in context: A157321 A100730 A044876 * A295787 A308534 A045167

Adjacent sequences: A080536 A080537 A080538 * A080540 A080541 A080542

KEYWORD

nonn,hard

AUTHOR

Ralf Stephan, Feb 20 2003

STATUS

approved