n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 58 |
5 | 324 |
6 | 2016 |
7 | 13629 |
8 | 98644 |
9 | 756852 |
10 | 6110309 |
11 | 51620412 |
12 | 454430088 |
13 | 4155005770 |
14 | 39354004740 |
15 | 385288338532 |
16 | 3892135131803 |
17 | 40507984800374 |
18 | 433792913778315 |
19 | 4774455016668509 |
20 | 53954983308058733 |
21 | 625485598856053837 |
22 | 7432389116043114682 |
[1,1,3,12,58,324,2016,13629,98644,756852,6110309, 51620412,454430088,4155005770,39354004740, 385288338532,3892135131803,40507984800374, 433792913778315,4774455016668509, 53954983308058733,625485598856053837, 7432389116043114682] |