|
REFERENCES
|
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
M. Gardner, Mathematical Games, Sci. Amer. Vol. 216 (No. 4, Apr. 1967), p. 118.
M. Gardner, Mathematical Magic Show. Random House, NY, 1978, p. 216.
|