n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 29 |
3 | 126 |
4 | 513 |
5 | 1998 |
6 | 7533 |
7 | 27702 |
8 | 99873 |
9 | 354294 |
10 | 1240029 |
11 | 4290894 |
12 | 14703201 |
13 | 49955454 |
14 | 168466797 |
15 | 564390342 |
16 | 1879706817 |
17 | 6227425638 |
18 | 20533285917 |
19 | 67411165086 |
20 | 220442258241 |
21 | 718277586606 |
22 | 2332658764269 |
23 | 7552375012566 |
[1,6,29,126,513,1998,7533,27702,99873,354294, 1240029,4290894,14703201,49955454,168466797, 564390342,1879706817,6227425638,20533285917, 67411165086,220442258241,718277586606, 2332658764269,7552375012566] |