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A086778 Number of n X n matrices over GF(5) with rank n-1. 0
1, 144, 461280, 36211968000, 70794513504000000, 3457427279866560000000000, 4220654362961578542000000000000000, 128805138489674665490472000000000000000000000 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 26 12:00 EDT 2022. Contains 356997 sequences. (Running on oeis4.)