We know that the first term in the sequence is t1=6.
We also know the equation for the n-th term in the sequnce: tn=3tn-1+2n
According this,
the second term is: t2=3t*2-1+2*2=6t-1+4=6t+3
the thirs term is: t3=9t-1+6=9t+5
the fouth term is: t4=12t-1+8=12t+7