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| n | a(n) |
|---|---|
| 1 | 424 |
| 2 | 16798 |
| 3 | 202184 |
| 4 | 1340867 |
| 5 | 6202712 |
| 6 | 22517208 |
| 7 | 68640720 |
| 8 | 183349893 |
| 9 | 441598504 |
| 10 | 978524338 |
| 11 | 2024486872 |
| 12 | 3954455687 |
| 13 | 7355653592 |
| 14 | 13117987436 |
| 15 | 22552473504 |
| 16 | 37543583241 |
| 17 | 60742198824 |
| 18 | 95806676806 |
| 19 | 147700371688 |
| 20 | 223054869835 |
[424,16798,202184,1340867,6202712,22517208, 68640720,183349893,441598504,978524338,2024486872, 3954455687,7355653592,13117987436,22552473504, 37543583241,60742198824,95806676806,147700371688, 223054869835] |