n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 19 |
6 | 72 |
7 | 280 |
8 | 1348 |
9 | 7542 |
10 | 48290 |
11 | 348902 |
12 | 2805666 |
13 | 24797845 |
14 | 238678891 |
15 | 2482575930 |
16 | 27731295522 |
17 | 330955304428 |
18 | 4201424981020 |
19 | 56521276891669 |
20 | 803122164193328 |
21 | 12018137424023094 |
22 | 188906053776728602 |
23 | 3111632374404898304 |
24 | 53597059526977558291 |
[0,1,3,7,19,72,280,1348,7542,48290,348902,2805666, 24797845,238678891,2482575930,27731295522, 330955304428,4201424981020,56521276891669, 803122164193328,12018137424023094, 188906053776728602,3111632374404898304, 53597059526977558291] |