A005018 Divisors of 20: a finite sequence associated with the Lie algebra A_4.

1, 2, 4, 5, 10, 20

Offset

1,2

References

E. B. Dynkin, Semisimple subalgebras of semisimple Lie algebras, Am. Math. Soc. Translations, Series 2, Vol. 6, 1957, pp. 111-244, esp. p. 211.

Links

Table of n, a(n) for n=1..6.

Index entries for sequences related to divisors of numbers

Formula

a(n) = A161706(n-1). - Reinhard Zumkeller, Jun 21 2009

Prog

(Sage) divisors(20); # Zerinvary Lajos, Jun 13 2009
(PARI) divisors(20)

Crossrefs

Sequence in context: A240100 A326156 A000675 * A249399 A118551 A161706

Adjacent sequences: A005015 A005016 A005017 * A005019 A005020 A005021

Keyword

nonn,fini,full,easy

Author

N. J. A. Sloane

Status

approved