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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 10 |
| 4 | 79 |
| 5 | 946 |
| 6 | 14653 |
| 7 | 267478 |
| 8 | 5817187 |
| 9 | 145061146 |
| 10 | 4089128425 |
| 11 | 128703410254 |
| 12 | 4470302200087 |
| 13 | 169912192575490 |
| 14 | 7014628977829237 |
| 15 | 312570024564324358 |
| 16 | 14952747796689292747 |
| 17 | 764341021646724256426 |
| 18 | 41578052013117358139809 |
| 19 | 2398149800670737138081470 |
[1,1,1,10,79,946,14653,267478,5817187,145061146, 4089128425,128703410254,4470302200087, 169912192575490,7014628977829237, 312570024564324358,14952747796689292747, 764341021646724256426,41578052013117358139809, 2398149800670737138081470] |