n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 22 |
5 | 138 |
6 | 356 |
7 | 2585 |
8 | 6830 |
9 | 53838 |
10 | 144156 |
11 | 1197546 |
12 | 3233692 |
13 | 27859444 |
14 | 75665736 |
15 | 669553209 |
16 | 1826204958 |
17 | 16493851110 |
18 | 45131989100 |
19 | 414263198030 |
20 | 1136416283860 |
21 | 10568504182860 |
22 | 29050963193720 |
23 | 273107307342090 |
24 | 751985844723308 |
25 | 7133921326564172 |
26 | 19670502565821464 |
[1,1,2,9,22,138,356,2585,6830,53838,144156, 1197546,3233692,27859444,75665736,669553209, 1826204958,16493851110,45131989100,414263198030, 1136416283860,10568504182860,29050963193720, 273107307342090,751985844723308,7133921326564172, 19670502565821464] |