266377183929domain: NAppears in sequencesNumber of n X n invertible matrices A over GF(3) such that A-I is invertible.at n=4A051680Triangle read by rows. T(n,k) is the number of invertible n X n matrices over GF(3) such that the dimension of the eigenspace corresponding to the eigenvalue 1 is k, 0 <= k <= n, n >= 0.at n=15A346384