0,1
F. Rodriguez Villegas, L. Sadun & J.F. Voloch, Blet: A mathematical puzzle, Amer. Math. Monthly, 109 No.8 (2002), 729-740.
Sequence in context: A139712 A175856 A075365 * A178144 A135737 A125179
Adjacent sequences: A075271 A075272 A075273 * A075275 A075276 A075277
nonn
N. J. A. Sloane (njas(AT)research.att.com), Oct 12 2002