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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 337536 |
| 4 | 585106 |
| 5 | 602056 |
| 6 | 2071960 |
| 7 | 11861410 |
| 8 | 20706120 |
| 9 | 54020170 |
| 10 | 72696726 |
| 11 | 87584646 |
| 12 | 89445636 |
| 13 | 95895930 |
| 14 | 98583340 |
| 15 | 98595070 |
| 16 | 112204200 |
| 17 | 205739220 |
| 18 | 279448296 |
| 19 | 292582836 |
| 20 | 337969690 |
| 21 | 349672456 |
| 22 | 432972780 |
| 23 | 437874186 |
| 24 | 474186576 |
| 25 | 479631880 |
| 26 | 483333426 |
| 27 | 621777466 |
| 28 | 643697776 |
[1,2,337536,585106,602056,2071960,11861410, 20706120,54020170,72696726,87584646,89445636, 95895930,98583340,98595070,112204200,205739220, 279448296,292582836,337969690,349672456,432972780, 437874186,474186576,479631880,483333426,621777466, 643697776] |