n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 57 |
4 | 338 |
5 | 2057 |
6 | 12741 |
7 | 79914 |
8 | 505954 |
9 | 3226638 |
10 | 20696685 |
11 | 133382658 |
12 | 862978221 |
13 | 5601919325 |
14 | 36467212610 |
15 | 237974911737 |
16 | 1556281907586 |
17 | 10196788555859 |
18 | 66921360130374 |
19 | 439860632463462 |
20 | 2895002186799453 |
21 | 19077000179746293 |
22 | 125849150650146714 |
[1,2,10,57,338,2057,12741,79914,505954,3226638, 20696685,133382658,862978221,5601919325, 36467212610,237974911737,1556281907586, 10196788555859,66921360130374,439860632463462, 2895002186799453,19077000179746293, 125849150650146714] |