The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A089010 a(n) = 1 if n is an exponent of the Weyl group W(E_8), 0 otherwise. 3
 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, 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, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 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. LINKS Antti Karttunen, Table of n, a(n) for n = 1..10000 FORMULA G.f.: x*(1-x^20)*(1-x^24)/((1-x^6)*(1-x^10)). MATHEMATICA PadRight[CoefficientList[Series[x(1-x^20)(1-x^24)/((1-x^6)(1-x^10)), {x, 0, 120}], x], 120, 0] (* Harvey P. Dale, May 15 2018 *) PROG (PARI) Vec(x*(1-x^20)*(1-x^24)/((1-x^6)*(1-x^10)) + O(x^90)) \\ Michel Marcus, Aug 19 2015 CROSSREFS Cf. A005776, A089011. Sequence in context: A319691 A079979 A288711 * A162289 A122276 A239199 Adjacent sequences:  A089007 A089008 A089009 * A089011 A089012 A089013 KEYWORD easy,nonn AUTHOR Paul Boddington, Nov 03 2003 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 21 10:26 EST 2020. Contains 331105 sequences. (Running on oeis4.)