OFFSET
1,2
COMMENTS
"Irreducible" is intended to mean "not factoring into blocks along the diagonal". The periods for n=6 are 396 times period 3, 2939 times period 4, 1684 times period 6 and 5904 times period 12.
LINKS
Wouter Meeussen, Periodic
Eric Weisstein's World of Mathematics, Periodic Matrices
CROSSREFS
KEYWORD
hard,nonn
AUTHOR
Wouter Meeussen, Nov 15 2005
STATUS
approved