n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 21 |
3 | 102 |
4 | 525 |
5 | 2334 |
6 | 11100 |
7 | 47496 |
8 | 210756 |
9 | 886080 |
10 | 3759114 |
11 | 15378051 |
12 | 63685767 |
13 | 255417357 |
14 | 1030081827 |
15 | 4078689249 |
16 | 16150234665 |
17 | 62991117084 |
18 | 245948154087 |
19 | 947944122906 |
20 | 3653360869998 |
21 | 13946363438502 |
22 | 53149517598207 |
23 | 200994216333375 |
24 | 759191650345380 |
[1,3,21,102,525,2334,11100,47496,210756,886080, 3759114,15378051,63685767,255417357,1030081827, 4078689249,16150234665,62991117084,245948154087, 947944122906,3653360869998,13946363438502, 53149517598207,200994216333375,759191650345380] |