I did it years ago with prime numbers 1; 3; 5; 7; 11;13 but...

  1. 15,090 Posts.
    lightbulb Created with Sketch. 92
    I did it years ago with prime numbers 1; 3; 5; 7; 11;13 but found more simple, quick and easy with 2; 6; 17 ema'sj
 
arrow-down-2 Created with Sketch. arrow-down-2 Created with Sketch.