n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 37 |
4 | 230 |
5 | 1434 |
6 | 8952 |
7 | 55917 |
8 | 349374 |
9 | 2183230 |
10 | 13643972 |
11 | 85270626 |
12 | 532926716 |
13 | 3330739972 |
14 | 20816939100 |
15 | 130105200765 |
16 | 813155081070 |
17 | 5082210417270 |
18 | 31763782696740 |
19 | 198523522444950 |
20 | 1240771573465140 |
21 | 7754820693127020 |
22 | 48467623215477120 |
23 | 302922622226091090 |
[1,1,6,37,230,1434,8952,55917,349374,2183230, 13643972,85270626,532926716,3330739972, 20816939100,130105200765,813155081070, 5082210417270,31763782696740,198523522444950, 1240771573465140,7754820693127020, 48467623215477120,302922622226091090] |