n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 18 |
5 | 46 |
6 | 121 |
7 | 323 |
8 | 875 |
9 | 2395 |
10 | 6611 |
11 | 18371 |
12 | 51337 |
13 | 144145 |
14 | 406420 |
15 | 1150126 |
16 | 3265412 |
17 | 9298372 |
18 | 26547710 |
19 | 75978322 |
20 | 217921336 |
21 | 626287520 |
22 | 1803176384 |
23 | 5200298000 |
24 | 15020569818 |
25 | 43447201226 |
26 | 125837214564 |
27 | 364911724264 |
28 | 1059404265599 |
29 | 3078918594707 |
[1,1,3,7,18,46,121,323,875,2395,6611,18371,51337, 144145,406420,1150126,3265412,9298372,26547710, 75978322,217921336,626287520,1803176384, 5200298000,15020569818,43447201226,125837214564, 364911724264,1059404265599,3078918594707] |