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| n | a(n) |
|---|---|
| 1 | 23 |
| 2 | 175 |
| 3 | 1116 |
| 4 | 5700 |
| 5 | 24126 |
| 6 | 87648 |
| 7 | 281016 |
| 8 | 812352 |
| 9 | 2152643 |
| 10 | 5297329 |
| 11 | 12231874 |
| 12 | 26724490 |
| 13 | 55625600 |
| 14 | 110928984 |
| 15 | 212948248 |
| 16 | 395089316 |
| 17 | 710860767 |
| 18 | 1243965435 |
| 19 | 2122565928 |
| 20 | 3539121568 |
| 21 | 5777563514 |
| 22 | 9250018192 |
| 23 | 14545817232 |
| 24 | 22496156480 |
[23,175,1116,5700,24126,87648,281016,812352, 2152643,5297329,12231874,26724490,55625600, 110928984,212948248,395089316,710860767, 1243965435,2122565928,3539121568,5777563514, 9250018192,14545817232,22496156480] |