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A138898
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Ratio of (2n-1)! to number of zeros in lower part of Sylvester matrix for polynomial of degree n with all nonzero coefficients.
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2
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60, 840, 30240, 1995840, 207567360, 31135104000, 6351561216000, 1689515283456000, 567677135241216000, 235018333989863424000, 117509166994931712000000, 69800445194989436928000000, 48581109855712648101888000000, 39156374543704394370121728000000, 36180490078382860397992476672000000, 37989514582302003417892100505600000000, 44979585265445572046784246998630400000000, 59642930061980828534035911520183910400000000
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OFFSET
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3,1
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LINKS
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Table of n, a(n) for n=3..20.
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FORMULA
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a(n) = (2n-1)!/((n-1)(n-2)), n>=3. - R. J. Mathar, Apr 30 2008
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MATHEMATICA
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Table[(2 n - 1)!/((n - 1)(n - 2)), {n, 3, 20}] - R. J. Mathar, Apr 30 2008
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CROSSREFS
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Cf. A002378, A009445, A007878, A138896, A138898.
Sequence in context: A168307 A063011 A008357 * A056321 A056312 A189607
Adjacent sequences: A138895 A138896 A138897 * A138899 A138900 A138901
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski, Apr 02 2008
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EXTENSIONS
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Edited and corrected by R. J. Mathar, Apr 30 2008
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STATUS
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approved
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