n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 207 |
7 | 923 |
8 | 4532 |
9 | 24271 |
10 | 140581 |
11 | 874434 |
12 | 5806557 |
13 | 40955973 |
14 | 305544958 |
15 | 2402139329 |
16 | 19837601155 |
17 | 171598571288 |
18 | 1550865447043 |
19 | 14611295961047 |
20 | 143210242799872 |
21 | 1457573997373131 |
22 | 15379106145570681 |
23 | 167962044452359398 |
24 | 1896100883094424657 |
25 | 22096376018936592193 |
[1,1,2,5,15,52,207,923,4532,24271,140581,874434, 5806557,40955973,305544958,2402139329,19837601155, 171598571288,1550865447043,14611295961047, 143210242799872,1457573997373131, 15379106145570681,167962044452359398, 1896100883094424657,22096376018936592193] |