n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 15 |
6 | 49 |
7 | 168 |
8 | 594 |
9 | 2150 |
10 | 7931 |
11 | 29718 |
12 | 112814 |
13 | 432957 |
14 | 1677050 |
15 | 6547856 |
16 | 25742454 |
17 | 101819100 |
18 | 404885630 |
19 | 1617725010 |
20 | 6491294600 |
21 | 26147434885 |
22 | 105691660110 |
23 | 428578242900 |
24 | 1742925259725 |
25 | 7106942278683 |
[0,1,1,2,5,15,49,168,594,2150,7931,29718,112814, 432957,1677050,6547856,25742454,101819100, 404885630,1617725010,6491294600,26147434885, 105691660110,428578242900,1742925259725, 7106942278683] |