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Search: id:A008997
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| A008997 |
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Orchard problem with 5 trees in a row (may not have all been proved optimal). |
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+0
3
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| 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 6, 6, 7, 9, 10, 11
(list; graph; listen)
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OFFSET
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5,5
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COMMENT
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Berloquin shows that a(21) >= 12.
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REFERENCES
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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.
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LINKS
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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
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CROSSREFS
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Cf. A003035, A006065.
Sequence in context: A123576 A094824 A029054 this_sequence A005851 A139821 A077563
Adjacent sequences: A008994 A008995 A008996 this_sequence A008998 A008999 A009000
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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