0,3
Cf. A005950.
Sequence in context: A020426 A101806 A038014 this_sequence A137485 A045083 A045079
Adjacent sequences: A005941 A005942 A005943 this_sequence A005945 A005946 A005947
nonn,easy
N. J. A. Sloane (njas(AT)research.att.com).
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