A080540 - OEIS

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A080540

Number of neutrons in longest known radioactive decay series ending with Lead 209, reversed.

5

127, 126, 128, 130, 132, 134, 136, 137, 139, 141, 142, 144, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163

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

OFFSET

0,1

COMMENTS

See comments in A080532. Protons are in A080536.

LINKS

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

C. Heilman, The Pictorial Periodic Table

FORMULA

a(n)=A080532(n)-A080536(n).

CROSSREFS

Cf. A080537, A080538, A080539.

Sequence in context: A320571 A082456 A326717 * A334105 A077358 A069686

Adjacent sequences: A080537 A080538 A080539 * A080541 A080542 A080543

KEYWORD

nonn,hard

AUTHOR

Ralf Stephan, Feb 20 2003

STATUS

approved