Orchard planting (Neil Sloane)	Discuss about this problem
A006065 0,0,0,1,1,1,2,2,3,5,6,7 4-in a row orchard problem with n trees. http://mathworld.wolfram.com/Orchard-PlantingProblem.html http://gpj.connectfree.co.uk/gpjm.htm#(10) Place n points ('apple trees') in the plane ('garden') so as to maximize the number of lines that contain exactly 4 trees Lines with fewer than 4 points or more than 4 points don't count Please send us a simpler description.