n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 18 |
3 | 112 |
4 | 965 |
5 | 10957 |
6 | 156699 |
7 | 2727793 |
8 | 56306695 |
9 | 1350043964 |
10 | 36979531548 |
11 | 1141573025171 |
12 | 39272377323692 |
13 | 1491452150268435 |
14 | 62027842189908230 |
15 | 2805631215820328991 |
16 | 137199563717151509076 |
17 | 7215932308408758314446 |
[1,4,18,112,965,10957,156699,2727793,56306695, 1350043964,36979531548,1141573025171, 39272377323692,1491452150268435,62027842189908230, 2805631215820328991,137199563717151509076, 7215932308408758314446] |