n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 15 |
5 | 43 |
6 | 143 |
7 | 447 |
8 | 1457 |
9 | 5153 |
10 | 17712 |
11 | 62226 |
12 | 228307 |
13 | 826403 |
14 | 3045356 |
15 | 11463886 |
16 | 42915761 |
17 | 163162575 |
18 | 626421084 |
19 | 2403106726 |
20 | 9332107293 |
21 | 36397643689 |
22 | 142264226087 |
23 | 560927157537 |
24 | 2216454163673 |
25 | 8789867068979 |
26 | 35060453041676 |
27 | 140072687401512 |
28 | 561842105897395 |
29 | 2261924959908545 |
[1,1,2,6,15,43,143,447,1457,5153,17712,62226, 228307,826403,3045356,11463886,42915761,163162575, 626421084,2403106726,9332107293,36397643689, 142264226087,560927157537,2216454163673, 8789867068979,35060453041676,140072687401512, 561842105897395,2261924959908545] |