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.
Adjacent sequences: A069423 A069424 A069425 this_sequence A069427 A069428 A069429
Sequence in context: A143042 A064261 A105978 this_sequence A093733 A133562 A062045
nonn
Ron Hardin (rhh(AT)cadence.com), Mar 22 2002.
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