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A178580 Expansion of the polynomial (1+x^3)*(1+x^9)*(1+x^11)*(1+x^15)*(1+x^17)*(1+x^23). 2
1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 2, 0, 0, 2, 1, 0, 3, 1, 1, 2, 0, 1, 2, 0, 1, 3, 0, 2, 2, 0, 2, 2, 0, 3, 1, 0, 2, 1, 0, 2, 1, 1, 3, 0, 1, 2, 0, 0, 2, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,21

COMMENTS

This is the Poincaré polynomial for the Lie group E_6.

REFERENCES

Borel, A. and Chevalley, C., The Betti numbers of the exceptional groups, Mem. Amer. Math. Soc. 1955, no. 14, pp 1-9.

LINKS

Table of n, a(n) for n=0..78.

CROSSREFS

Sequence in context: A215462 A025843 A303906 * A035437 A156996 A029304

Adjacent sequences:  A178577 A178578 A178579 * A178581 A178582 A178583

KEYWORD

nonn,fini,full,easy

AUTHOR

N. J. A. Sloane, Dec 24 2010

STATUS

approved

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Last modified July 13 05:18 EDT 2020. Contains 335673 sequences. (Running on oeis4.)