This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A170977 Expansion of Prod((1+x^(4*i-1)),i=1..m-1)*(1+x^(2*m-1)) for m = 5. 0
 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1 (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 PoincarĂ© polynomial for O(2m). REFERENCES H. Weyl, The Classical Groups, Princeton, 1946, see p. 238. LINKS MATHEMATICA CoefficientList[Series[Product[1 + x^(4 i - 1), {i, 4}]*(1 + x^9), {x, 0, 45}], x] (* Vincenzo Librandi, Mar 14 2013 *) CROSSREFS Sequence in context: A066799 A238900 A037832 * A039737 A144382 A139553 Adjacent sequences:  A170974 A170975 A170976 * A170978 A170979 A170980 KEYWORD nonn,fini,full AUTHOR N. J. A. Sloane, Aug 29 2010 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 13 18:57 EDT 2019. Contains 327981 sequences. (Running on oeis4.)