n | a(n) |
---|---|
1 | 0 |
2 | 4 |
3 | 8 |
4 | 73 |
5 | 292 |
6 | 1713 |
7 | 8235 |
8 | 43733 |
9 | 220672 |
10 | 1142790 |
11 | 5840082 |
12 | 30047605 |
13 | 154064032 |
14 | 791329272 |
15 | 4060908537 |
16 | 20849136414 |
17 | 107016685715 |
18 | 549372170263 |
19 | 2820041046796 |
20 | 14476302849381 |
21 | 74310986678816 |
22 | 381462539353767 |
[0,4,8,73,292,1713,8235,43733,220672,1142790, 5840082,30047605,154064032,791329272,4060908537, 20849136414,107016685715,549372170263, 2820041046796,14476302849381,74310986678816, 381462539353767] |