3024 1 x9 9
9 x8 72
72 x7 504
504 x6 3024
10
10
5
8
62
17?
15
next in the sequence: 10,20,30,20
From the pattern (n + 4, n + 2, n + ?) I would say the next following number is 20 (n + 1).
The numbers are increasing by 1,4,9,16,25,36.... which are square numbers so the next increase is 49. Making the next number in the sequence 141
21. This is the Fibonacci series.
There is no sequence, please add one and I'll help.