5,2
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
H. T. Croft, K. J. Falconer and R. K. Guy, Unsolved Problems in Geometry, B15.
Adjacent sequences: A005838 A005839 A005840 this_sequence A005842 A005843 A005844
Sequence in context: A005046 A141827 A143077 this_sequence A005828 A084764 A061789
nonn,hard,nice
N. J. A. Sloane (njas(AT)research.att.com).
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