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.

Adjacent sequences: A069368 A069369 A069370 this_sequence A069372 A069373 A069374

Sequence in context: A034633 A138266 A023092 this_sequence A143725 A119128 A069245

nonn

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