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: A187997 A188065 A204676 * A176859 A176757 A151349
Adjacent sequences: A075270 A075271 A075272 * A075274 A075275 A075276
nonn
N. J. A. Sloane (njas(AT)research.att.com), Oct 12 2002