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| n | a(n) |
|---|---|
| 1 | 6068 |
| 2 | 16453 |
| 3 | 42372 |
| 4 | 121800 |
| 5 | 336302 |
| 6 | 965197 |
| 7 | 2703084 |
| 8 | 7792018 |
| 9 | 22113228 |
| 10 | 63167136 |
| 11 | 179982226 |
| 12 | 513478377 |
| 13 | 1462536224 |
| 14 | 4168738950 |
| 15 | 11886385630 |
| 16 | 33880353109 |
| 17 | 96579218388 |
| 18 | 275361558899 |
| 19 | 784995134662 |
| 20 | 2237694214071 |
| 21 | 6379091028140 |
[6068,16453,42372,121800,336302,965197,2703084, 7792018,22113228,63167136,179982226,513478377, 1462536224,4168738950,11886385630,33880353109, 96579218388,275361558899,784995134662, 2237694214071,6379091028140] |