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| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 66 |
| 3 | 489 |
| 4 | 3631 |
| 5 | 26951 |
| 6 | 200045 |
| 7 | 1484850 |
| 8 | 11021410 |
| 9 | 81807240 |
| 10 | 607220362 |
| 11 | 4507138581 |
| 12 | 33454573430 |
| 13 | 248319075015 |
| 14 | 1843166918425 |
| 15 | 13681044394077 |
| 16 | 101548575900358 |
| 17 | 753751904485831 |
| 18 | 5594779921615960 |
| 19 | 41527672679871145 |
| 20 | 308242258385100002 |
| 21 | 2287951231622970075 |
| 22 | 16982489246315828049 |
[10,66,489,3631,26951,200045,1484850,11021410, 81807240,607220362,4507138581,33454573430, 248319075015,1843166918425,13681044394077, 101548575900358,753751904485831,5594779921615960, 41527672679871145,308242258385100002, 2287951231622970075,16982489246315828049] |