1,5
V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.
Sequence in context: A035708 A042306 A053494 this_sequence A010978 A022590 A004414
Adjacent sequences: A054935 A054936 A054937 this_sequence A054939 A054940 A054941
nonn,easy,more
N. J. A. Sloane (njas(AT)research.att.com), May 24 2000
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