OFFSET
0,2
COMMENTS
a(n) = k^(n^2) with k = 2, 3, 4,... counts n X n matrices over an alphabet of size k.
Also number of elements in de Bruijn tori (2n X 2n). - Charles R Greathouse IV, Nov 19 2013
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..25
FORMULA
a(n) = 16^(n^2).
MATHEMATICA
Table[16^(n^2), {n, 7}]
PROG
(Magma) [16^(n^2): n in [0..10]]; // Vincenzo Librandi, Jun 05 2011
(PARI) a(n)=16^n^2 \\ Charles R Greathouse IV, Jan 23 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Origlio (vincenzo.origlio(AT)itc.cnr.it), Nov 21 2002
STATUS
approved