The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A296468 Largest number of points that can be placed on an n X n point grid so that no point is equally distant from two other points on the same row or column. 4
 1, 4, 6, 11, 17, 24, 28, 32, 40, 47, 57, 66, 78, 90 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This sequence is a 2-dimensional generalization of A003002 ("no 3-term arithmetic progressions"). LINKS EXAMPLE Up to 66 points (x) may be placed on a 12 X 12 point grid. Example with two symmetry axes: x x . x x . . . . x x . x . x . . x x . . x . x . x x . . . . x x . x x x . . . . x x . x x . . x . . . x . x x . x . . . x . x . . . x x . x . . x . x x . . . x . x . . . x . x x . x . . . x . . x x . x x . . . . x x x . x x . . . . x x . x . x . . x x . . x . x . x x . . . . x x . x x CROSSREFS Cf. A003002, A193838, A300131. Sequence in context: A343341 A343345 A343346 * A060577 A197985 A058579 Adjacent sequences:  A296465 A296466 A296467 * A296469 A296470 A296471 KEYWORD nonn,hard,more,nice AUTHOR Heinrich Ludwig, Dec 13 2017 EXTENSIONS a(13)-a(14) from Bert Dobbelaere, Jan 06 2020 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 16 13:05 EDT 2021. Contains 345057 sequences. (Running on oeis4.)