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: A022529 A022195 A069388 this_sequence A069274 A017690 A010801
Adjacent sequences: A069411 A069412 A069413 this_sequence A069415 A069416 A069417
nonn
Ron Hardin (rhhardin(AT)att.net), Mar 22 2002.
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