0,2
Cf. A042054.
Sequence in context: A019413 A040138 A107139 this_sequence A075683 A157191 A006029
Adjacent sequences: A042052 A042053 A042054 this_sequence A042056 A042057 A042058
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).
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