A069920 Noninvertible n X n matrices mod 6 (i.e., over the ring Z_6).

4, 1008, 8190720, 2332005728256, 23674927650073214976, 8618480376852061696039059456, 112746432609478969278312620164116381696, 53053593891934168169788522401776516627950360068096

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Formula

a(n) = 6^(n^2) - A065498(n).

Prog

(PARI) for(n=1, 10, print1(6^(n^2)*(1-prod(k=1, n, (1-1/2^k)*(1-1/3^k))), ", "))

Crossrefs

Cf. A065498, A069580.

Sequence in context: A180268 A087365 A024059 * A368371 A217024 A013780

Adjacent sequences: A069917 A069918 A069919 * A069921 A069922 A069923

Keyword

nonn

Author

Sharon Sela (sharonsela(AT)hotmail.com), May 05 2002

Extensions

More terms from Benoit Cloitre, May 11 2002

Status

approved