n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 46 |
5 | 247 |
6 | 1436 |
7 | 8684 |
8 | 54102 |
9 | 345042 |
10 | 2241014 |
11 | 14771896 |
12 | 98568908 |
13 | 664518873 |
14 | 4519394316 |
15 | 30969650840 |
16 | 213625862342 |
17 | 1482134240438 |
18 | 10335968352644 |
19 | 72411026552273 |
20 | 509383556655134 |
21 | 3596650497366507 |
22 | 25480925906761956 |
[1,1,2,9,46,247,1436,8684,54102,345042,2241014, 14771896,98568908,664518873,4519394316, 30969650840,213625862342,1482134240438, 10335968352644,72411026552273,509383556655134, 3596650497366507,25480925906761956] |