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%I #7 Sep 08 2022 08:45:08
%S 1,20,160000,512000000000,655360000000000000000,
%T 335544320000000000000000000000000,
%U 68719476736000000000000000000000000000000000000
%N Number of n X n matrices over an alphabet of size 20.
%C a(n) = k^(n^2) with k = 2, 3, 4, ... counts n X n matrices over an alphabet of size k.
%H Vincenzo Librandi, <a href="/A078354/b078354.txt">Table of n, a(n) for n = 0..25</a>
%F a(n) = 20^(n^2).
%t Table[20^(n^2), {n, 0, 7}]
%o (Magma) [20^(n^2): n in [0..10]]; // _Vincenzo Librandi_, Jun 05 2011
%Y Cf. A078353, A002416.
%K nonn
%O 0,2
%A Vincenzo Origlio (vincenzo.origlio(AT)itc.cnr.it), Nov 25 2002
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