1,1
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. J. A. Sloane, Transforms
Sequence in context: A055391 A134876 A019612 this_sequence A166476 A052950 A086851
Adjacent sequences: A007441 A007442 A007443 this_sequence A007445 A007446 A007447
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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