0,5
See A000045 for the Fibonacci numbers.
Sequence in context: A121343 A023439 A147660 this_sequence A023440 A077373 A132634
Adjacent sequences: A013984 A013985 A013986 this_sequence A013988 A013989 A013990
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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