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Anonymous
70. You just add 14 each time.
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15,30,32,31,62,64,63..... (*2,+2,-1)
14 lol as i think you just go 3 back hahahahaha what did you get
a,b,c,d = 1,2,4,3 b=2a c=b+2 d=c-1 7*2=14 14+2=16 16-1=15
15
15.