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A170981 Expansion of Prod((1+x^(4*i-1)),i=1..m-1)*(1+x^(2*m-1)) for m = 9. 1
1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 2, 1, 1, 1, 2, 1, 1, 1, 3, 2, 1, 2, 3, 2, 1, 3, 4, 2, 2, 4, 4, 2, 2, 5, 4, 3, 3, 6, 4, 3, 4, 6, 5, 4, 5, 7, 5, 4, 5, 7, 6, 4, 7, 7, 6, 4, 7, 7, 6, 5, 8, 8, 6, 5, 8, 7, 6, 6, 8, 8, 6, 6, 7, 8, 5, 6, 8, 8, 5, 6, 7, 7, 4, 6, 7, 7, 4, 6, 7, 5, 4, 5, 7, 5, 4, 5, 6 (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 Poincaré 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..153 (full sequence)

FORMULA

a(n) = a(153-n). - Rick L. Shepherd, Mar 02 2013

CROSSREFS

Sequence in context: A327857 A227481 A143654 * A161096 A214247 A211987

Adjacent sequences:  A170978 A170979 A170980 * A170982 A170983 A170984

KEYWORD

nonn,fini,full,easy

AUTHOR

N. J. A. Sloane, Aug 29 2010

STATUS

approved

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Last modified July 13 13:48 EDT 2020. Contains 335688 sequences. (Running on oeis4.)