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Search: id:A141226
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| A141226 |
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Numbers n such that the central point of the square n x n lattice sees the maximal number of points. |
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+0
5
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| 1, 3, 11, 23, 27, 35, 39, 47, 59, 95, 147, 167, 179, 207, 219, 227, 279, 347, 363, 399, 543, 567, 587, 627, 767, 779, 935
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OFFSET
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1,2
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COMMENT
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These n are the numbers for which A141225(n) is odd. Note that n must be odd. When A141225(n)=1, the central point is the only point seeing the maximal number of points. Except for 1, these numbers are 3 or 11 (mod 12).
These numbers also seem to produce cubic n x n x n lattices in which the central point has maximal visibility; see A141228. Note that for n>3, n-1 is twice a prime in A141246.
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CROSSREFS
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Sequence in context: A139593 A121471 A087078 this_sequence A049491 A000355 A163769
Adjacent sequences: A141223 A141224 A141225 this_sequence A141227 A141228 A141229
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KEYWORD
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nonn
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AUTHOR
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T. D. Noe (noe(AT)sspectra.com), Jun 15 2008, Jun 17 2008
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