1,2
Cf. A018799.
Sequence in context: A124362 A058435 A070694 this_sequence A139181 A072321 A101118
Adjacent sequences: A018851 A018852 A018853 this_sequence A018855 A018856 A018857
nonn,base
David W. Wilson (davidwwilson(AT)comcast.net)
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