I noticed that different patterns emerge when you subtract 1 from each value in the sequence. From there we get:
0
1
2
4
16
160
15680
159591040
16866847940875520
Each (excluding 0 and 1) is a multiple of the previous term:
2 = 1 * 2
4 = 2 * 2
16 = 4 * 4
160 = 16 * 10
15680 = 160 * 98
159591040 = 15680 * 10178
16866847940875520 = 159591040 * 105687938
Anything ring a bell? Notice any other patterns?
2 - 2 = 0
4 - 2 = 2
10 - 2 = 8 = 2 * 4
98 - 2 = 96 = 8 * 12
10178 - 2 = 10176 = 96 * 106
105687938 - 2 = 105687936 = 10176 * 10386
I noticed that different patterns emerge when you subtract 1 from each value in the sequence. From there we get:
0
1
2
4
16
160
15680
159591040
16866847940875520
Each (excluding 0 and 1) is a multiple of the previous term:
1
2 = 1 * 2
4 = 2 * 2
16 = 4 * 4
160 = 16 * 10
15680 = 160 * 98
159591040 = 15680 * 10178
16866847940875520 = 159591040 * 105687938
Anything ring a bell? Notice any other patterns?