1,1
Cf. 1 X n A000225, 2 X n A016269, 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: A139162 A078961 A049292 * A057008 A159487 A130661
Adjacent sequences: A069403 A069404 A069405 * A069407 A069408 A069409
nonn
R. H. Hardin (rhhardin(AT)att.net), Mar 22 2002.