1,2
J. H. Conway, personal communication.
N. J. A. Sloane, Classic Sequences
Cf. A019587.
Adjacent sequences: A019585 A019586 A019587 this_sequence A019589 A019590 A019591
Sequence in context: A066748 A106583 A081450 this_sequence A060083 A069931 A056943
nonn,easy,nice
njas and J. H. Conway (conway(AT)math.princeton.edu)
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