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A178686 Expansion of the polynomial (1+x^3)*(1+x^5)*(1+x^7)*(1+x^9). 1
1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 2, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,13

COMMENTS

This is the Poincaré polynomial for the Lie group A_4.

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..24.

CROSSREFS

A row of A142724.

Sequence in context: A075446 A184159 A231122 * A142724 A174656 A178798

Adjacent sequences: A178683 A178684 A178685 * A178687 A178688 A178689

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane, Dec 25 2010

STATUS

approved

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Last modified November 27 19:48 EST 2022. Contains 358406 sequences. (Running on oeis4.)