Term 1 2 3 4 5 n th
Sequence 7 10 13 16 19 n x 3 + 4
Multiply 3 3 3 3 3  
notes
  go to 1 x 3 = 3
need 1 to = 7 so  + 4
1 x 3 + 4 = 7
n x 3 + 4
5 x 3 + 4 = 19
100 x 3+4 = 304