0
Anonymous
It appears that the sequence is:
{| |- | 0 1 3 7 15 31 63 127 255 511 1023 2047 4095 8191
|}
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The next number is 4, followed by -2
4.
4
1+7=8 8-7=1 1+3=4 4+3=7 7-7=0 0+7=7 7-7=0 x=0+3 the next number is 3