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: A066359 A109030 A093223 this_sequence A166003 A043615 A156117

Adjacent sequences: A069367 A069368 A069369 this_sequence A069371 A069372 A069373

nonn

Ron Hardin (rhhardin(AT)att.net), Mar 22 2002.