n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 75 |
6 | 265 |
7 | 927 |
8 | 3229 |
9 | 11253 |
10 | 39355 |
11 | 138362 |
12 | 489440 |
13 | 1742576 |
14 | 6244395 |
15 | 22516585 |
16 | 81673947 |
17 | 297894234 |
18 | 1092086024 |
19 | 4022418903 |
20 | 14879231036 |
21 | 55255415912 |
22 | 205931156743 |
23 | 769994355746 |
24 | 2887687533958 |
25 | 10859294097589 |
26 | 40939724979676 |
27 | 154701255400490 |
28 | 585829636549849 |
29 | 2222842322625552 |
[1,1,2,6,21,75,265,927,3229,11253,39355,138362, 489440,1742576,6244395,22516585,81673947, 297894234,1092086024,4022418903,14879231036, 55255415912,205931156743,769994355746, 2887687533958,10859294097589,40939724979676, 154701255400490,585829636549849,2222842322625552] |