n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 34 |
5 | 125 |
6 | 459 |
7 | 1715 |
8 | 6432 |
9 | 24300 |
10 | 92375 |
11 | 352715 |
12 | 1352034 |
13 | 5200299 |
14 | 20058297 |
15 | 77558625 |
16 | 300540160 |
17 | 1166803109 |
18 | 4537567188 |
19 | 17672631899 |
20 | 68923264250 |
21 | 269128935495 |
22 | 1052049481857 |
23 | 4116715363799 |
24 | 16123801834656 |
[1,1,3,9,34,125,459,1715,6432,24300,92375,352715, 1352034,5200299,20058297,77558625,300540160, 1166803109,4537567188,17672631899,68923264250, 269128935495,1052049481857,4116715363799, 16123801834656] |