I got 106; it goes up by +3, +9, +17, +29, etc. Those numbers were thought to have an incremental addition too, so basically 3+b=9, 9+x=17, etc. with b=6 and x=8. There were incremental differences there too, because 1*2=2 between the 6 and 8, 2*2=4 between the 8 and 12, so the next pattern could be 2*3=6 between 12 and the increment, so adding 6 to 12 would be 18. Add 18 to the +29, then you have +47. Add 47 to 59 and you would get 106.