1, 3, 7, 15, 31 next two terms in the nsequence

Rule: multiply 2 then add 1

1 x 2 + 1 = 3

3 x 2 + 1 = 7

7 x 2 + 1 = 15

15 x 2 + 1 = 31

31 x 2 + 1 = 63

63 x 2 + 1 = 127

So

1, 3, 7, 15, 31, 63, 127

Answer

next two terms in the sequence: 63, 127

1 + 2^1 = 3

3 + 2^2 = 7

7 + 2^3 = 15

15 + 2^4 = 31

31 + 2^5 = 63

63 + 2^6 = 127

so the next two terms in the sequence 1, 3, 7, 15, 31, is 63 and 127.