A078354 Number of n X n matrices over an alphabet of size 20.

1, 20, 160000, 512000000000, 655360000000000000000, 335544320000000000000000000000000, 68719476736000000000000000000000000000000000000

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.

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..25

Formula

a(n) = 20^(n^2).

Mathematica

Table[20^(n^2), {n, 0, 7}]

Prog

(Magma) [20^(n^2): n in [0..10]]; // Vincenzo Librandi, Jun 05 2011

Crossrefs

Cf. A078353, A002416.

Sequence in context: A175853 A340167 A013766 * A203306 A211489 A172669

Adjacent sequences: A078351 A078352 A078353 * A078355 A078356 A078357

Keyword

nonn

Author

Vincenzo Origlio (vincenzo.origlio(AT)itc.cnr.it), Nov 25 2002

Status

approved