n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 77 |
6 | 287 |
7 | 1079 |
8 | 4082 |
9 | 15522 |
10 | 59271 |
11 | 227131 |
12 | 873051 |
13 | 3364827 |
14 | 12998867 |
15 | 50321075 |
16 | 195162350 |
17 | 758156366 |
18 | 2949614789 |
19 | 11490869489 |
20 | 44819531180 |
21 | 175009397380 |
22 | 684059403670 |
23 | 2676260628574 |
24 | 10479320689274 |
25 | 41065736472890 |
26 | 161043272100440 |
27 | 631974335773536 |
[1,1,2,6,21,77,287,1079,4082,15522,59271,227131, 873051,3364827,12998867,50321075,195162350, 758156366,2949614789,11490869489,44819531180, 175009397380,684059403670,2676260628574, 10479320689274,41065736472890,161043272100440, 631974335773536] |