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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 7 |
| 4 | 384 |
| 5 | 391 |
| 6 | 2339 |
| 7 | 2730 |
| 8 | 149759 |
| 9 | 152489 |
| 10 | 912204 |
| 11 | 1064693 |
| 12 | 58405626 |
| 13 | 59470319 |
| 14 | 355757221 |
| 15 | 415227540 |
| 16 | 22778044381 |
| 17 | 23193271921 |
| 18 | 138744403986 |
| 19 | 161937675907 |
| 20 | 8883378902964 |
| 21 | 9045316578871 |
| 22 | 54109961797319 |
| 23 | 63155278376190 |
| 24 | 3464494994111579 |
[1,1,6,7,384,391,2339,2730,149759,152489,912204, 1064693,58405626,59470319,355757221,415227540, 22778044381,23193271921,138744403986,161937675907, 8883378902964,9045316578871,54109961797319, 63155278376190,3464494994111579] |