OFFSET
2,1
LINKS
F. Rodriguez Villegas, L. Sadun & J.F. Voloch, Blet: A mathematical puzzle, Amer. Math. Monthly, 109 No.8 (2002), 729-740.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 12 2002
EXTENSIONS
Offset corrected by Michel Marcus, Sep 30 2017
STATUS
approved