OFFSET
2,2
REFERENCES
S. Ulam, On some mathematical problems connected with patterns of growth of figures, pp. 215-224 of R. E. Bellman, ed., Mathematical Problems in the Biological Sciences, Proc. Sympos. Applied Math., Vol. 14, Amer. Math. Soc., 1962. See Example 3.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 11 2021
STATUS
approved