(1+1)1 = 2 (2+1)2 = 621=(6+1)3 = 21 (21+1)4 = 88 So (88+1)5 = 445
The next number will be 13+21 = 34
The next number in the sequence 3-15-6-30-21 is -207.
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
The next number is -21
26
The next composite number after 20 is 21.
the next number is 21 because it is adding the last number stated.
28
The next number will be 13+21 = 34
The next number in the sequence 3-15-6-30-21 is -207.
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
The next number is -21
31
a
26
21
26