1,2
Cf. 1 X n A000225, 2 X n A005061, n X 2 A001333, vertical path of 1 A069361-A069395, vertical paths of 0+1 A069396-A069416, vertical path of 1 not 0 A069417-A069428, no vertical paths A069429-A069447, no horizontal or vertical paths A069448-A069452.
Sequence in context: A202050 A094666 A163043 * A163054 A110844 A015990
Adjacent sequences: A069363 A069364 A069365 * A069367 A069368 A069369
nonn
R. H. Hardin (rhhardin(AT)att.net), Mar 22 2002.