Question

plz answer this

1,3,7,25,103,? ​

Answer 1

Answer:

3131

Step-by-step explanation:

1 * 1 + 2 =3

3 * 2 + 1=7

7 * 3 + 4=25

25 * 4 + 3=103

103 * 5 + 6=521

521 * 6 + 5=3131

Here the sequence is first multiply by 2 and then add 1 AND

in the next number the reverse is following