n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 14 |
4 | 72 |
5 | 262 |
6 | 2266 |
7 | 13582 |
8 | 78952 |
9 | 1073318 |
10 | 6111354 |
11 | 51512782 |
12 | 711544290 |
13 | 7083724494 |
14 | 53971180750 |
15 | 497724073414 |
16 | 12107546905192 |
17 | 92786772785254 |
18 | 1022794345965706 |
19 | 9782774173172782 |
20 | 237827594204392882 |
21 | 3191236514753612878 |
22 | 31668668622796517470 |
[1,2,4,14,72,262,2266,13582,78952,1073318,6111354, 51512782,711544290,7083724494,53971180750, 497724073414,12107546905192,92786772785254, 1022794345965706,9782774173172782, 237827594204392882,3191236514753612878, 31668668622796517470] |