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Search: id:A082873
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| A082873 |
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Independence number of king KG_2 on triangle board B_n. |
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+0
2
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| 1, 1, 3, 6, 8, 12, 15, 19, 25, 30, 36, 42, 49, 55, 63, 72
(list; graph; listen)
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OFFSET
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1,3
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REFERENCES
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J.-J. Bode, H. Harborth and M. Harborth, King independence on triangle boards, Discr. Math., 266 (2003), 101-107.
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FORMULA
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a(n) = floor((n+1)^2/4) if n == 0, 1, 4, 6, 9, 10, 11 (mod 12), a(n) = floor((n+1)^2/4) - 1 otherwise.
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CROSSREFS
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Cf. A082874.
Sequence in context: A135731 A118335 A077024 this_sequence A161909 A006048 A049827
Adjacent sequences: A082870 A082871 A082872 this_sequence A082874 A082875 A082876
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KEYWORD
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nonn,easy,more
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), May 25 2003
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