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Search: id:A089010
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| A089010 |
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1 if n is an exponent of the Weyl group W(E_8), 0 otherwise. |
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+0
2
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| 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The exponents are 1, 7, 11, 13, 17, 19, 23, 29. The point of this sequence is that a similar generating function gives the exponents for any finite Coxeter group.
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FORMULA
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G.f.: x*(1-x^20)*(1-x^24)/((1-x^6)*(1-x^10))
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CROSSREFS
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Cf. A005776.
Sequence in context: A015989 A014189 A079979 this_sequence A162289 A122276 A066288
Adjacent sequences: A089007 A089008 A089009 this_sequence A089011 A089012 A089013
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Boddington (psb(AT)maths.warwick.ac.uk), Nov 03 2003
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