0,3
Cf. A001055, A000041.
Sequence in context: A073093 A088873 A085082 this_sequence A135981 A135615 A166469
Adjacent sequences: A067551 A067552 A067553 this_sequence A067555 A067556 A067557
easy,nonn
Naohiro Nomoto (n_nomoto(AT)yabumi.com), Jan 29 2002
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