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: A012839 A017813 A017760 this_sequence A057011 A122128 A114430

Adjacent sequences: A069416 A069417 A069418 this_sequence A069420 A069421 A069422

nonn

Ron Hardin (rhh(AT)cadence.com), Mar 22 2002.