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| n | a(n) |
|---|---|
| 1 | 137536 |
| 2 | 293316 |
| 3 | 648536 |
| 4 | 1597896 |
| 5 | 4055128 |
| 6 | 11145960 |
| 7 | 31418264 |
| 8 | 94267656 |
| 9 | 289507096 |
| 10 | 935746056 |
| 11 | 3091187096 |
| 12 | 10648070856 |
| 13 | 37386104728 |
| 14 | 135693045000 |
| 15 | 499984167704 |
| 16 | 1889644564296 |
| 17 | 7218907939096 |
| 18 | 28112535319176 |
| 19 | 110246083106456 |
[137536,293316,648536,1597896,4055128,11145960, 31418264,94267656,289507096,935746056,3091187096, 10648070856,37386104728,135693045000,499984167704, 1889644564296,7218907939096,28112535319176, 110246083106456] |