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| n | a(n) |
|---|---|
| 1 | 2148 |
| 2 | 4953 |
| 3 | 15899 |
| 4 | 67209 |
| 5 | 327193 |
| 6 | 1697028 |
| 7 | 9016304 |
| 8 | 48280085 |
| 9 | 259123809 |
| 10 | 1392132935 |
| 11 | 7481800749 |
| 12 | 40211989018 |
| 13 | 216132151786 |
| 14 | 1161698250394 |
| 15 | 6244080094399 |
| 16 | 33561655362846 |
| 17 | 180392638316345 |
| 18 | 969604161599181 |
[2148,4953,15899,67209,327193,1697028,9016304, 48280085,259123809,1392132935,7481800749, 40211989018,216132151786,1161698250394, 6244080094399,33561655362846,180392638316345, 969604161599181] |