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A086190 Sum of rank(M) over all n X n matrices over GF(3). 2
0, 2, 128, 50258, 152583680, 3848135499362, 831635515536146048, 1565118078583425627499058, 25891049952879626239605534955520, 3786985075909223206935197348611801222082, 4916838220400668315060476949839366817233722142848 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

FORMULA

a(n) = Sum_{r=1..n} r*Product_{j=0..r-1} (q^n-q^j)^2/(q^r-q^j) with q=3.

PROG

(PARI) a(n)=sum(r=1, n, r*prod(j=0, (r-1), (3^n-3^j)^2/(3^r-3^j)))

CROSSREFS

Cf. A086098.

Sequence in context: A010367 A024344 A012673 * A024345 A012524 A012670

Adjacent sequences:  A086187 A086188 A086189 * A086191 A086192 A086193

KEYWORD

nonn

AUTHOR

Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 26 2003

EXTENSIONS

More terms from Benoit Cloitre, Aug 27 2003

a(10) from Andrew Howroyd, Jul 08 2018

STATUS

approved

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Last modified September 25 22:56 EDT 2022. Contains 356986 sequences. (Running on oeis4.)