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A005796 Degrees of fundamental invariants of Weyl group W(E_8). 2
2, 8, 12, 14, 18, 20, 24, 30 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) - 1 is the n-th number < 30 that is relatively prime to 30. [Jonathan Sondow, Apr 16 2009]

LINKS

Table of n, a(n) for n=1..8.

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

G. J. Fox, Letter to N. J. A. Sloane, May 1991

FORMULA

a(n) = Prime(n+2) + 1, for n = 2, 3, ..., 8. [Jonathan Sondow, Apr 16 2009]

CROSSREFS

Sequence in context: A043377 A107629 A080058 * A086173 A108725 A277568

Adjacent sequences:  A005793 A005794 A005795 * A005797 A005798 A005799

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 21 06:40 EST 2019. Contains 320371 sequences. (Running on oeis4.)