n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 39 |
4 | 270 |
5 | 1962 |
6 | 14796 |
7 | 114831 |
8 | 911574 |
9 | 7368894 |
10 | 60457428 |
11 | 502162902 |
12 | 4214515212 |
13 | 35686162548 |
14 | 304491863448 |
15 | 2615468845311 |
16 | 22598114065254 |
17 | 196269877811574 |
18 | 1712578870493316 |
19 | 15005719955119698 |
[1,1,6,39,270,1962,14796,114831,911574,7368894, 60457428,502162902,4214515212,35686162548, 304491863448,2615468845311,22598114065254, 196269877811574,1712578870493316, 15005719955119698] |