n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 24 |
6 | 62 |
7 | 154 |
8 | 396 |
9 | 992 |
10 | 2536 |
11 | 6376 |
12 | 16238 |
13 | 40914 |
14 | 103954 |
15 | 262298 |
16 | 665478 |
17 | 1680726 |
18 | 4260262 |
19 | 10766470 |
20 | 27274444 |
[1,2,4,10,24,62,154,396,992,2536,6376,16238,40914, 103954,262298,665478,1680726,4260262,10766470, 27274444] |