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A005555 A finite sequence associated with the Lie algebra E_8. 25
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20, 21, 22, 24, 25, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 56, 57, 60, 61, 62, 63, 64, 70, 84, 85, 88, 110, 111, 112, 120, 156, 157, 159, 160, 166, 182, 184, 231, 232, 280, 399, 400, 520, 760, 1240 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The g.f. (5-6*z+2*z**2)/(z-1)**4 conjectured by Simon Plouffe in his 1992 dissertation is wrong.

LINKS

Table of n, a(n) for n=0..62.

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

R. K. Guy, Letter to N. J. A. Sloane, May 1990

Simon Plouffe, Approximations de séries génératrices et quelques conjectures, Dissertation, Université du Québec à Montréal, 1992.

Simon Plouffe, 1031 Generating Functions and Conjectures, Université du Québec à Montréal, 1992.

CROSSREFS

Sequence in context: A316530 A296864 A124695 * A128829 A194967 A023770

Adjacent sequences:  A005552 A005553 A005554 * A005556 A005557 A005558

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified November 18 02:07 EST 2019. Contains 329242 sequences. (Running on oeis4.)