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A170984 Expansion of Prod((1+x^(4*i-1)),i=1..m-1)*(1+x^(2*m-1)) for m = 12. 11
1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 2, 1, 0, 1, 2, 2, 0, 1, 4, 1, 0, 2, 4, 1, 0, 4, 5, 1, 1, 5, 5, 1, 1, 7, 6, 1, 3, 9, 6, 0, 4, 11, 6, 0, 7, 13, 5, 1, 9, 15, 5, 2, 13, 16, 4, 3, 16, 17, 4, 5, 21, 18, 2, 8, 24, 17, 2, 12, 29, 16, 3, 16, 31, 15, 3, 21, 35, 13, 4, 27, 35, 11, 6, 33, 37 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,19

COMMENTS

Prod((1+x^(4*i-1)),i=1..m-1)*(1+x^(2*m-1)) is the Poincare polynomial for O(2m).

REFERENCES

H. Weyl, The Classical Groups, Princeton, 1946, see p. 238.

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 0..276

CROSSREFS

Sequence in context: A080941 A177405 A209318 * A114021 A053616 A094718

Adjacent sequences:  A170981 A170982 A170983 * A170985 A170986 A170987

KEYWORD

nonn,fini,easy

AUTHOR

N. J. A. Sloane, Aug 29 2010

STATUS

approved

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Last modified May 18 23:01 EDT 2013. Contains 225428 sequences.