n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 19 |
6 | 64 |
7 | 223 |
8 | 799 |
9 | 2927 |
10 | 10922 |
11 | 41382 |
12 | 158800 |
13 | 615939 |
14 | 2410880 |
15 | 9510650 |
16 | 37774357 |
17 | 150929671 |
18 | 606239784 |
19 | 2446566976 |
20 | 9915210221 |
21 | 40336587662 |
22 | 164662328192 |
23 | 674300310836 |
24 | 2769234827610 |
25 | 11402791485018 |
26 | 47067085053193 |
[1,1,2,6,19,64,223,799,2927,10922,41382,158800, 615939,2410880,9510650,37774357,150929671, 606239784,2446566976,9915210221,40336587662, 164662328192,674300310836,2769234827610, 11402791485018,47067085053193] |