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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 2 |
| 3 | 32 |
| 4 | 29 |
| 5 | 258 |
| 6 | 432 |
| 7 | 2525 |
| 8 | 6313 |
| 9 | 30188 |
| 10 | 97855 |
| 11 | 428478 |
| 12 | 1605301 |
| 13 | 6821375 |
| 14 | 27390903 |
| 15 | 115569231 |
| 16 | 478335810 |
| 17 | 2017576268 |
| 18 | 8457463080 |
| 19 | 35707225807 |
| 20 | 150472100292 |
| 21 | 635822248364 |
| 22 | 2685274511197 |
| 23 | 11352580693193 |
| 24 | 47989709554314 |
[4,2,32,29,258,432,2525,6313,30188,97855,428478, 1605301,6821375,27390903,115569231,478335810, 2017576268,8457463080,35707225807,150472100292, 635822248364,2685274511197,11352580693193, 47989709554314] |