OFFSET
1,3
COMMENTS
No such arrangement is possible on a 2n+1 X 2n+1 grid.
LINKS
D. B. Anderson, Sample solutions for n = 18, 20, 22, 24, 26
David Brent Anderson Update on the no-three-in-line problem, J. Combin. Theory Ser. A 27 (1979), no. 3, 365--366. MR0555806(81g:05055).
A. Flammenkamp, Solutions of the no-three-in-line problem
CROSSREFS
KEYWORD
nonn,more,fini
AUTHOR
N. J. A. Sloane, May 29 2012
EXTENSIONS
a(11)-a(21) from Giovanni Resta, Mar 22 2013 (data from A. Flammenkamp's website)
STATUS
approved