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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 13 |
| 3 | 8 |
| 4 | 80 |
| 5 | 398 |
| 6 | 1382 |
| 7 | 6686 |
| 8 | 30218 |
| 9 | 131674 |
| 10 | 611429 |
| 11 | 2764144 |
| 12 | 12588291 |
| 13 | 57406818 |
| 14 | 261411829 |
| 15 | 1191585608 |
| 16 | 5430308271 |
| 17 | 24749976109 |
| 18 | 112805678823 |
| 19 | 514149652500 |
| 20 | 2343435239710 |
| 21 | 10681117766000 |
| 22 | 48683513703774 |
| 23 | 221894678763366 |
[1,13,8,80,398,1382,6686,30218,131674,611429, 2764144,12588291,57406818,261411829,1191585608, 5430308271,24749976109,112805678823,514149652500, 2343435239710,10681117766000,48683513703774, 221894678763366] |