1,2
Cf. A120678.
Sequence in context: A068568 A073169 A166268 this_sequence A098200 A092405 A130234
Adjacent sequences: A120674 A120675 A120676 this_sequence A120678 A120679 A120680
nonn
R. P. Stanley (rstan(AT)math.mit.edu), Jun 24 2006
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