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A005018
Divisors of 20: a finite sequence associated with the Lie algebra A_4.
1
1, 2, 4, 5, 10, 20
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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
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Last modified August 29 18:55 EDT 2024. Contains 375518 sequences. (Running on oeis4.)