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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 123 |
| 3 | 3650 |
| 4 | 118059 |
| 5 | 4015380 |
| 6 | 141175410 |
| 7 | 5082313276 |
| 8 | 186243853995 |
| 9 | 6920379988871 |
| 10 | 260030830600748 |
| 11 | 9860709859708350 |
| 12 | 376821110248674594 |
| 13 | 14494688046084958080 |
| 14 | 560708803489098556632 |
| 15 | 21797478402692370515400 |
| 16 | 851057798310071946207915 |
| 17 | 33356751162583463626417872 |
[1,5,123,3650,118059,4015380,141175410,5082313276, 186243853995,6920379988871,260030830600748, 9860709859708350,376821110248674594, 14494688046084958080,560708803489098556632, 21797478402692370515400,851057798310071946207915, 33356751162583463626417872] |