n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 20 |
4 | 70 |
5 | 253 |
6 | 938 |
7 | 3546 |
8 | 13617 |
9 | 52967 |
10 | 208255 |
11 | 826315 |
12 | 3304456 |
13 | 13304924 |
14 | 53891402 |
15 | 219442686 |
16 | 897772983 |
17 | 3688451380 |
18 | 15211545938 |
19 | 62950542636 |
20 | 261329456566 |
21 | 1087985751336 |
22 | 4541524025769 |
23 | 19003488710465 |
24 | 79696345430789 |
[1,2,6,20,70,253,938,3546,13617,52967,208255, 826315,3304456,13304924,53891402,219442686, 897772983,3688451380,15211545938,62950542636, 261329456566,1087985751336,4541524025769, 19003488710465,79696345430789] |