n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 20 |
4 | 70 |
5 | 251 |
6 | 911 |
7 | 3327 |
8 | 12190 |
9 | 44744 |
10 | 164407 |
11 | 604487 |
12 | 2223504 |
13 | 8181175 |
14 | 30108147 |
15 | 110820165 |
16 | 407946421 |
17 | 1501844193 |
18 | 5529362694 |
19 | 20358557249 |
20 | 74961030414 |
21 | 276017648570 |
22 | 1016360893036 |
23 | 3742540945813 |
24 | 13781324308298 |
25 | 50748099850042 |
[1,2,6,20,70,251,911,3327,12190,44744,164407, 604487,2223504,8181175,30108147,110820165, 407946421,1501844193,5529362694,20358557249, 74961030414,276017648570,1016360893036, 3742540945813,13781324308298,50748099850042] |