n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 25 |
5 | 69 |
6 | 297 |
7 | 919 |
8 | 4209 |
9 | 14330 |
10 | 66413 |
11 | 237589 |
12 | 1127925 |
13 | 4224288 |
14 | 20166864 |
15 | 77647110 |
16 | 375206178 |
17 | 1483748803 |
18 | 7192465521 |
19 | 28949796874 |
20 | 141317035936 |
21 | 578798473432 |
22 | 2831000009495 |
23 | 11738326687294 |
24 | 57666232555593 |
25 | 242042851859253 |
26 | 1190667232643237 |
27 | 5042932509993216 |
28 | 24879899873021542 |
[1,1,3,6,25,69,297,919,4209,14330,66413,237589, 1127925,4224288,20166864,77647110,375206178, 1483748803,7192465521,28949796874,141317035936, 578798473432,2831000009495,11738326687294, 57666232555593,242042851859253,1190667232643237, 5042932509993216,24879899873021542] |