find the next one ..? 1,1,1/2,1/6, ..?

Keep practicing — related questions

• Find the next : (1,1,1,2,2,3,4,5,7,9,12,16, ?)
• 2,1,(1/2),(1/4).............. What number should come next?
• Find the next one,2,3,12,13,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39
• Find the next : 0,0,2,6,12,?
• Find the next number in the series 1/2,1,3/2,2,___,3,....
• Find the next number.. 1,2,6,24,120,?
• Find the next number ??
• Find the next... 10 ,23 ,40 ,61 ,_