n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 47 |
4 | 155 |
5 | 2027 |
6 | 6597 |
7 | 42835 |
8 | 138875 |
9 | 3599155 |
10 | 11654465 |
11 | 75457289 |
12 | 244238477 |
13 | 3161900479 |
14 | 10232916665 |
15 | 66231885067 |
16 | 214336798299 |
17 | 11097918730051 |
18 | 35913975952793 |
19 | 232441522435405 |
20 | 752199270651129 |
[1,2,7,47,155,2027,6597,42835,138875,3599155, 11654465,75457289,244238477,3161900479, 10232916665,66231885067,214336798299, 11097918730051,35913975952793,232441522435405, 752199270651129] |