0,5
Cf. A000360, A000361.
Sequence in context: A110492 A144331 A167259 this_sequence A109247 A021307 A152893
Adjacent sequences: A000873 A000874 A000875 this_sequence A000877 A000878 A000879
nonn
Melvyn Jeremie Lafitte (mjlafitte(AT)gmail.com)
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