n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 7 |
4 | 49 |
5 | 364 |
6 | 2548 |
7 | 18130 |
8 | 126910 |
9 | 890463 |
10 | 6234270 |
11 | 43655178 |
12 | 305586246 |
13 | 2139225879 |
14 | 14974581153 |
15 | 104822829531 |
16 | 733759913733 |
17 | 5136324781952 |
18 | 35954273473664 |
19 | 251679952469351 |
20 | 1761759667285457 |
21 | 12332317933624871 |
[1,1,7,49,364,2548,18130,126910,890463,6234270, 43655178,305586246,2139225879,14974581153, 104822829531,733759913733,5136324781952, 35954273473664,251679952469351,1761759667285457, 12332317933624871] |