This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A078186 #14 Sep 08 2022 08:45:08
%S A078186 1,16,65536,68719476736,18446744073709551616,
%T A078186 1267650600228229401496703205376,
%U A078186 22300745198530623141535718272648361505980416,100433627766186892221372630771322662657637687111424552206336
%N A078186 Number of n X n matrices over an alphabet of size 16.
%C A078186 a(n) = k^(n^2) with k = 2, 3, 4,... counts n X n matrices over an alphabet of size k.
%C A078186 Also number of elements in de Bruijn tori (2n X 2n). - _Charles R Greathouse IV_, Nov 19 2013
%H A078186 Vincenzo Librandi, <a href="/A078186/b078186.txt">Table of n, a(n) for n = 0..25</a>
%F A078186 a(n) = 16^(n^2).
%t A078186 Table[16^(n^2), {n, 7}]
%o A078186 (Magma) [16^(n^2): n in [0..10]]; // _Vincenzo Librandi_, Jun 05 2011
%o A078186 (PARI) a(n)=16^n^2 \\ _Charles R Greathouse IV_, Jan 23 2012
%Y A078186 Cf. A078185.
%K A078186 nonn,easy
%O A078186 0,2
%A A078186 Vincenzo Origlio (vincenzo.origlio(AT)itc.cnr.it), Nov 21 2002