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A133510
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Number of primitive H-invariant prime ideals in O_q(M_{2,n}) generic quantum matrices.
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0
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2, 5, 17, 53, 167, 515, 1577, 4793, 14507, 43775, 131837, 396533, 1191647, 3579035, 10745297, 32252273, 96789587, 290434295, 871433957, 2614564013, 7844216327, 23533697555, 70603189817, 211813763753, 635449679867, 1906365816815
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OFFSET
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1,1
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COMMENTS
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Equation given in Bell, Launois, Nguyen, page 2.
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LINKS
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FORMULA
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a(n) = ((3^(n+1))-(2^(n+1))+((-1)^(n+1))+2)/4.
G.f.: x(2-5x+2x^2+3x^3)/((1-x)(1-3x)(1-2x)(1+x)). [From R. J. Mathar, Oct 30 2008]
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EXAMPLE
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a(8) = ((3^(8 + 1)) - (2^(8 + 1)) + ((-1)^(8 + 1)) + 2) / 4 = 4793.
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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Corrected the definition: Changed O_q(M_n) to O_q(M_{2,n}) Karel Casteels (kcasteel(AT)sfu.ca), Feb 20 2010
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STATUS
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approved
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