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Search: id:A086752
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| A086752 |
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Number of n X n matrices over GF(3) with rank n-1. |
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+0
2
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| 1, 32, 8112, 17971200, 355207057920, 63010655570903040, 100505356319291594711040, 1442361950110091891786121216000, 186276322602412236974585775503690956800
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OFFSET
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1,2
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FORMULA
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For n>=2: a(n) = product j=0...n-2 (3^n - 3^j)^2 / (3^(n-1)- 3^j).
a(n) = (3^n-1)/2*product_{j = 0...n-2} 3^n-3^j. - David Wasserman (wasserma(AT)spawar.navy.mil), Mar 28 2005
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CROSSREFS
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Cf. A086699, A053290, A060868.
Sequence in context: A028461 A016829 A069052 this_sequence A139568 A139294 A004147
Adjacent sequences: A086749 A086750 A086751 this_sequence A086753 A086754 A086755
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KEYWORD
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nonn,easy
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AUTHOR
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Yuval Dekel (dekelyuval(AT)hotmail.com), Jul 31 2003
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EXTENSIONS
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More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Mar 28 2005
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