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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 42 |
| 3 | 246 |
| 4 | 2545 |
| 5 | 23877 |
| 6 | 242107 |
| 7 | 2501312 |
| 8 | 26078075 |
| 9 | 273889895 |
| 10 | 2882907875 |
| 11 | 30394399694 |
| 12 | 320657578263 |
| 13 | 3384095560949 |
| 14 | 35720637784327 |
| 15 | 377078563204650 |
| 16 | 3980732189348259 |
| 17 | 42024536489585919 |
| 18 | 443657010445417107 |
[1,42,246,2545,23877,242107,2501312,26078075, 273889895,2882907875,30394399694,320657578263, 3384095560949,35720637784327,377078563204650, 3980732189348259,42024536489585919, 443657010445417107] |