%I #11 Jul 03 2018 02:26:19
%S 1,385,6569479,5421836400001,218857429741036363207,
%T 432771509734663800164593788001,
%U 41931064368881878511703371604583698172807
%N Singular n X n matrices over GF(7).
%H Harry J. Smith, <a href="/A060721/b060721.txt">Table of n, a(n) for n = 1..34</a>
%F For n >= 1, a(n) = 7^(n^2) - A053293(n) = 7^(n^2) - (7^n - 1)*(7^n - 7)*...*(7^n - 7^(n-1)).
%p for n from 1 to 15 do printf(`%d,`, 7^(n^2) - product(7^n-7^j, j=0..n-1)) od:
%o (PARI) a(n)={7^(n^2) - prod(j=0, n - 1, 7^n - 7^j)} \\ _Harry J. Smith_, Jul 10 2009
%Y Cf. A053293.
%K nonn
%O 1,2
%A Avi Peretz (njk(AT)netvision.net.il), Apr 21 2001
%E More terms from _James A. Sellers_, Apr 24 2001