# How can you arrange #7# dots so that there are #6# lines of #3# colinear dots?

##### 1 Answer

Jun 24, 2016

See explanation...

#### Explanation:

Here's one solution:

**Bonus**

This is an example of a problem that is very difficult to solve in the general case. The maximum number lines of

#0, 0, 1, 1, 2, 4, 6, 7, 10, 12, 16, 19, 22, 26#

The next number in the sequence is known to be