1,2
By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738.
Sequence in context: A034711 A076445 A013835 * A151649 A122500 A196520
Adjacent sequences: A068734 A068735 A068736 * A068738 A068739 A068740
nonn
R. H. Hardin (rhhardin(AT)att.net), Feb 26 2002