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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 202 |
| 3 | 3040 |
| 4 | 35182 |
| 5 | 362100 |
| 6 | 3476928 |
| 7 | 31848813 |
| 8 | 281845934 |
| 9 | 2429033768 |
| 10 | 20498682291 |
| 11 | 170050970491 |
| 12 | 1390738347774 |
| 13 | 11237781105036 |
| 14 | 89873465482971 |
| 15 | 712350529942518 |
| 16 | 5602092417764388 |
| 17 | 43752038622648030 |
| 18 | 339600817518201684 |
[3,202,3040,35182,362100,3476928,31848813, 281845934,2429033768,20498682291,170050970491, 1390738347774,11237781105036,89873465482971, 712350529942518,5602092417764388, 43752038622648030,339600817518201684] |