login
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
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.
CROSSREFS
A row of A142724.
Sequence in context: A075446 A184159 A231122 * A142724 A174656 A364047
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Dec 25 2010
STATUS
approved