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A008997 Orchard problem with 5 trees in a row (may not have all been proved optimal). 3
1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 6, 6, 7, 9, 10, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,5

COMMENTS

Berloquin shows that a(21) >= 12.

REFERENCES

S. A. Burr, B. Gr\"{u}nbaum and N. J. A. Sloane, The Orchard Problem, Geometriae Dedicata, 2 (1974), 397-424.

M. Gardner, Time Travel and Other Mathematical Bewilderments. Freeman, NY, 1988, Chap. 22.

LINKS

Table of n, a(n) for n=5..20.

S. A. Burr, B. Gr\"{u}nbaum and N. J. A. Sloane, The Orchard Problem, Geometriae Dedicata, 2 (1974), 397-424.

P. Berloquin, a(21) >= 12 (from an article in Jeux & Strategies from 1983 - see Fig. 13)

Eric Weisstein's World of Mathematics, Orchard-Planting Problem

CROSSREFS

Cf. A003035, A006065.

Sequence in context: A123576 A094824 A029054 * A005851 A237121 A139821

Adjacent sequences:  A008994 A008995 A008996 * A008998 A008999 A009000

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified September 21 14:09 EDT 2014. Contains 247026 sequences.