which number comes next?2,5,11,23

What number comes next?2-5-11-23-47-95- 196,148,108,76,52...Which number comes next? What number comes next which number comes Which letter comes next? 1.Which letter comes next?A,C ,F ,J .2.Which number comesnex ( )Look.2 3 5 9 17 ----------.Which is the next(下一个)number? the number which comes after seven What number comes next?1 11 21 1211 111221 312211 13112221 _ 10,1,9,6,8,11,7( ) What number comes next? 奥英难题,1.What number comes next in the following series?9,12,2 what number comes next in the following series?