Each term seems to be double of the previous number starting with 3.
Hence 4th term = 24 and 5th is 48
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3n
The nth term is 18 -3n and so the next term will be 3
t(n) = 3*n
If 3 is the first term, then the nth term is [ 3 x 2(n-1) ] .
If 3 is the first term, then the nth term is [ 3 x 2(n-1) ] .