Find the law 1 2 6 12 23 44 () 164

Find the law 1 2 6 12 23 44 () 164

eighty-five
The problem has to start with the fifth number
The fifth number is the sum of the first four
12=1+2+3+6
23=2+3+6+12
44=3+6+12+23
Similarly, x = 6 + 12 + 23 + 44 = 85
Check again, 164 = 12 + 23 + 44 + 85 is also true