1,2
By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738.
Sequence in context: A122429 A173506 A173840 * A189309 A203707 A176096
Adjacent sequences: A068728 A068729 A068730 * A068732 A068733 A068734
nonn
R. H. Hardin (rhhardin(AT)att.net), Feb 26 2002