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Search: id:A086190
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| A086190 |
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Sum of rank(M) over all n X n matrices over GF(3). |
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+0
2
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| 0, 2, 128, 50258, 152583680, 3848135499362, 831635515536146048, 1565118078583425627499058, 25891049952879626239605534955520, 3786985075909223206935197348611801222082
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n) = sum r=1..n r*product j=0..(r-1) (q^n-q^j)^2/(q^r-q^j) with q=3.
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PROGRAM
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(PARI) a(n)=sum(r=1, n, r*prod(j=0, (r-1), (3^n-3^j)^2/(3^r-3^j)))
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CROSSREFS
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Cf. A086098.
Sequence in context: A010367 A024344 A012673 this_sequence A024345 A012524 A012670
Adjacent sequences: A086187 A086188 A086189 this_sequence A086191 A086192 A086193
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KEYWORD
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nonn
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AUTHOR
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Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 26 2003
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EXTENSIONS
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More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 27 2003
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