A086778 Number of n X n matrices over GF(5) with rank n-1.
1, 144, 461280, 36211968000, 70794513504000000, 3457427279866560000000000, 4220654362961578542000000000000000, 128805138489674665490472000000000000000000000
Offset: 1
Keywords
Formula
For n>=2: a(n) = product j=0...n-2 (5^n - 5^j)^2 / (5^(n-1)- 5^j).
Extensions
More terms from David Wasserman, Mar 28 2005