There are infinitely many possible answers. A simple quadratic rule is
Un = n2 + n for n = 1, 2, 3
Chat with our AI personalities
The pattern is X*2=Y-2+Z: 4*2=8 8-2=6 6*2=12 12-2=10 etc.
5-30-6-42-7-56-8-72
3 6 4 8 6 12 10 20 18 36 34 68 Multiply 3 by 2 to get 6 Subtract 2 to get 4 Multiply 4 by 2 to get 8 Subtract 2 to get 6 Multiply 6 by 2 to get 12 Subtract 2 to get 10 .... Got it?
9902
Multiply each value by 6.