A086098 -id:A086098 - cp's OEIS frontend

A086190 Sum of rank(M) over all n X n matrices over GF(3).

0, 2, 128, 50258, 152583680, 3848135499362, 831635515536146048, 1565118078583425627499058, 25891049952879626239605534955520, 3786985075909223206935197348611801222082, 4916838220400668315060476949839366817233722142848

Offset: 0

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

nonn

Cf. A086098.

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

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

More terms from Benoit Cloitre, Aug 27 2003

a(10) from Andrew Howroyd, Jul 08 2018

A086207 Sum of rank(M) over all n X n matrices over GF(4).

Original entry on oeis.org

3, 435, 704403, 15823018515, 5272966965638163, 26837910294320000900115, 2117959516569888987677094001683, 2614420107255201240346554326291784252435, 50761384915342243255034590495173254359633089772563, 15560120110421752320376568335982564883819269596340271934585875

Offset: 1

Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 27 2003

nonn

Cf. A086190, A086098.

a(n) = {my(q=4); sum(r=1, n, r*prod(j=0, r-1, (q^n-q^j)^2/(q^r-q^j)))}

a(n) = Sum_{r=1..n} r*Product_{j=0..r-1} (q^n-q^j)^2/(q^r-q^j) with q=4.

a(6)-a(10) from Andrew Howroyd, Jul 08 2018

cp's OEIS Frontend

A086190 Sum of rank(M) over all n X n matrices over GF(3).

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