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A325604 Lower left-hand x-coordinate for 3 X 3 invisible forest with 0 < x < y. 12
1274, 1884, 1924, 1448, 594, 2254, 2364, 2210, 1598, 1000, 2624, 740, 664, 2408, 1924, 1924, 494, 1000, 230, 2914, 650, 1000, 644, 3794, 1924, 3794, 2430, 104, 4146, 3534, 4234, 1748, 2254, 2408, 1274, 1064, 4640, 4520, 2484, 3794 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
These are 3 X 3 rectangles of lattice points not visible along straight lines of sight from the origin. The sequence is ordered by Euclidean distance from (0,0).
LINKS
E. Goins, P. Harris, B. Kubik, A. Mbirika, Lattice Point Visibility on Generalized Lines of Sight, arXiv:1710.04554 [math.NT], 2017; Amer. Math. Monthly 125 (2018) 593-601.
F. Herzog, B. M. Stewart, Patterns of Visible and Nonvisible Lattice Points, Amer. Math. Monthly 78 (1971) 487-496
S. Laishram, F. Luca, Rectangles Of Nonvisible Lattice Points, J. Int. Seq. 18 (2015) 15.10.8.
EXAMPLE
(1274,1308), (1884,2000), (1924,2330), (1448,2714), (594,3128), (2254,2540), (2364,2924), (2210,3080), (1598,3484), (1000,3794)
CROSSREFS
Sequence in context: A273000 A282328 A187465 * A230758 A318201 A236013
KEYWORD
nonn
AUTHOR
Benjamin Hutz, May 10 2019
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)