OFFSET
1,2
REFERENCES
Dan Hoey, Bill Gosper and Richard C. Schroeppel, Discussions in Math-Fun Mailing list, circa Jul 13 1999.
LINKS
Daniel J. Heath and R. Robert Rdyberg, III, On Polyominoes and Digital Cameras, Mathematics Magazine, Vol. 90, No. 2 (April 2017), pp. 135-141.
R. C. Schroeppel, A few mathematical experiments
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 06 2004
STATUS
approved