What will come in place of question mark (?) in the series X5C, U8F, ?, O17L, L23O?

Which number will come in the place of question mark? 9, 25, 49, ?, 121

Which number will come in the place of question mark? 143, 275, 495, ?

Which number will come in the place of question mark? 6, 11, 21, 36, 56, ?

Which number will come in the place of question mark? 5, 13, 29, ?, 125, 253

What should come in place of question mark (?) in the following number series? 132 156 ? 210 240 272