0,3
Cf. A000041.
Sequence in context: A127727 A036343 A058253 this_sequence A092791 A070892 A075800
Adjacent sequences: A004086 A004087 A004088 this_sequence A004090 A004091 A004092
nonn,base
N. J. A. Sloane (njas(AT)research.att.com).
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