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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 8 |
| 6 | 36 |
| 7 | 35 |
| 8 | 201 |
| 9 | 393 |
| 10 | 2370 |
| 11 | 3971 |
| 12 | 46094 |
| 13 | 66675 |
| 14 | 613439 |
| 15 | 2139350 |
| 16 | 10016839 |
| 17 | 23424253 |
| 18 | 294723254 |
| 19 | 465082931 |
| 20 | 4972761822 |
| 21 | 15773188813 |
| 22 | 90323063945 |
| 23 | 196342666487 |
| 24 | 2587522663248 |
| 25 | 4967200045397 |
| 26 | 39800811900389 |
[1,2,3,7,8,36,35,201,393,2370,3971,46094,66675, 613439,2139350,10016839,23424253,294723254, 465082931,4972761822,15773188813,90323063945, 196342666487,2587522663248,4967200045397, 39800811900389] |