To see the pretty pattern you have to install the
Java Plug-in
!
Order
4
4 Sieves (Order 4)
Maneuver
Walter Randelshofer 2007
NF2 NB2 · NU2 · NR2 NL2 · NU · NR2 NL2 · NU2 · NF2 NB2 · NU-
(12l)
