|
| |
|
|
A005018
|
|
Divisors of 20: a finite sequence associated with the Lie algebra A_4.
|
|
1
| | |
|
|
|
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
| Index entries for sequences related to divisors of numbers
|
|
|
FORMULA
| a(n) = A161706(n-1). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 21 2009]
|
|
|
PROG
| (Other) sage: divisors(20); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 13 2009]
(PARI) divisors(20)
|
|
|
CROSSREFS
| Sequence in context: A133040 A018424 A000675 * A118551 A161706 A128401
Adjacent sequences: A005015 A005016 A005017 * A005019 A005020 A005021
|
|
|
KEYWORD
| nonn,fini,full,easy
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
