OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..30
J. Overbey, W. Traves and J. Wojdylo, On the Keyspace of the Hill Cipher.
MATHEMATICA
Table[Product[13^n - 13^k, {k, 0, n-1}], {n, 0, 8}]
PROG
(Magma) [1] cat [&*[(13^n - 13^k): k in [0..n-1]]: n in [1..8]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Jan 29 2013
STATUS
approved