On Jan 27, 10:22 pm, "Andrey Falko" <ma3ox... / gmail.com> wrote:
> 13: |||||||||||||
> 26: |||||||||||||x||
> 34: ||||x||||+|x||

13 and 26 can be done with less.  34 is incorrect: 4 * 4 + 1 * 2 = 16 
+ 2 = 18 (I assume it came from (4 * 4 + 1) * 2).