Question

1,3,7,15,31
I need to know the next 3 numbers please

Answer 1

1,3,7,15,31,63,127,255

Explanation:

Its doubling the number and adding 1.

1(2)+1=3. 3(2)+1=7. 7(2)+1=15. 15(2)+1=31. 31(2)+1=63. 63(2)+1=127. 127(2)+1=255