1,2
Cf. 2 X n A001047, n X 2 A034182, 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: A145750 A105978 A171395 * A093733 A133562 A202445
Adjacent sequences: A069423 A069424 A069425 * A069427 A069428 A069429
nonn
R. H. Hardin (rhhardin(AT)att.net), Mar 22 2002.