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| n | a(n) |
|---|---|
| 1 | 104 |
| 2 | 669 |
| 3 | 3927 |
| 4 | 22119 |
| 5 | 120233 |
| 6 | 637948 |
| 7 | 3321772 |
| 8 | 17052553 |
| 9 | 86573591 |
| 10 | 435717423 |
| 11 | 2177845221 |
| 12 | 10825761528 |
| 13 | 53576004128 |
| 14 | 264200974309 |
| 15 | 1299108852679 |
| 16 | 6372932446759 |
| 17 | 31203614429489 |
| 18 | 152543921033076 |
| 19 | 744788303718996 |
[104,669,3927,22119,120233,637948,3321772, 17052553,86573591,435717423,2177845221, 10825761528,53576004128,264200974309, 1299108852679,6372932446759,31203614429489, 152543921033076,744788303718996] |