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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 4 |
| 3 | 176 |
| 4 | 344 |
| 5 | 58725 |
| 6 | 80384 |
| 7 | 85503 |
| 8 | 88485 |
| 9 | 176961 |
| 10 | 440545 |
| 11 | 846507 |
| 12 | 881089 |
| 13 | 10149887 |
| 14 | 13344765 |
| 15 | 20299776 |
| 16 | 21872637 |
| 17 | 43876345 |
| 18 | 590299136 |
| 19 | 600522751 |
| 20 | 601243645 |
| 21 | 4607164415 |
| 22 | 4610834429 |
| 23 | 9214328832 |
| 24 | 9290153981 |
| 25 | 19742392313 |
| 26 | 36858855424 |
| 27 | 36869931007 |
| 28 | 39667007485 |
[0,4,176,344,58725,80384,85503,88485,176961, 440545,846507,881089,10149887,13344765,20299776, 21872637,43876345,590299136,600522751,601243645, 4607164415,4610834429,9214328832,9290153981, 19742392313,36858855424,36869931007,39667007485] |