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A005556 Exponents m_i associated with Weyl group W(E6). 8
1, 4, 5, 7, 8, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 141.

LINKS

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

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

PROG

(MAGMA) Exponents(RootDatum("E6")); // Sergei Haller (sergei(AT)sergei-haller.de), Dec 21 2006

CROSSREFS

Sequence in context: A032722 A293856 A098416 * A159698 A288931 A191276

Adjacent sequences:  A005553 A005554 A005555 * A005557 A005558 A005559

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane

EXTENSIONS

Edited by N. J. A. Sloane, May 13 2008

STATUS

approved

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Last modified November 18 09:46 EST 2019. Contains 329261 sequences. (Running on oeis4.)