A086778 Number of n X n matrices over GF(5) with rank n-1.

1, 144, 461280, 36211968000, 70794513504000000, 3457427279866560000000000, 4220654362961578542000000000000000, 128805138489674665490472000000000000000000000

Offset

1,2

Links

Table of n, a(n) for n=1..8.

Formula

For n>=2: a(n) = product j=0...n-2 (5^n - 5^j)^2 / (5^(n-1)- 5^j).

Crossrefs

Cf. A085404, A053292, A060870.

Sequence in context: A159424 A013751 A033514 * A227652 A159436 A318197

Adjacent sequences: A086775 A086776 A086777 * A086779 A086780 A086781

Keyword

nonn

Author

Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 03 2003

Extensions

More terms from David Wasserman, Mar 28 2005

Status

approved