n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 24 |
3 | 124 |
4 | 624 |
5 | 3124 |
6 | 15624 |
7 | 78124 |
8 | 390624 |
9 | 1953124 |
10 | 9765624 |
11 | 48828124 |
12 | 244140624 |
13 | 1220703124 |
14 | 6103515624 |
15 | 30517578124 |
16 | 152587890624 |
17 | 762939453124 |
18 | 3814697265624 |
19 | 19073486328124 |
20 | 95367431640624 |
[0,4,24,124,624,3124,15624,78124,390624,1953124, 9765624,48828124,244140624,1220703124,6103515624, 30517578124,152587890624,762939453124, 3814697265624,19073486328124,95367431640624] |