n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 75 |
7 | 225 |
8 | 715 |
9 | 2347 |
10 | 7990 |
11 | 27908 |
12 | 99991 |
13 | 365587 |
14 | 1362310 |
15 | 5159208 |
16 | 19831101 |
17 | 77233517 |
18 | 304423574 |
19 | 1212962072 |
20 | 4881181036 |
21 | 19821471956 |
22 | 81165639197 |
23 | 334925706659 |
24 | 1391935877463 |
25 | 5823186349671 |
26 | 24511802558326 |
27 | 103772782048252 |
28 | 441696903185704 |
[1,1,2,4,10,26,75,225,715,2347,7990,27908,99991, 365587,1362310,5159208,19831101,77233517, 304423574,1212962072,4881181036,19821471956, 81165639197,334925706659,1391935877463, 5823186349671,24511802558326,103772782048252, 441696903185704] |