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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 16 |
| 4 | 538 |
| 5 | 26676 |
| 6 | 1705373 |
| 7 | 131524408 |
| 8 | 11778395196 |
| 9 | 1195433981028 |
| 10 | 135247561603456 |
| 11 | 16853285080609312 |
| 12 | 2292048750536003426 |
| 13 | 337754031605269049112 |
| 14 | 53608164572529006153454 |
| 15 | 9118712400086550140230888 |
| 16 | 1655104918901340697851158384 |
| 17 | 319341008921919836189242604080 |
[1,1,16,538,26676,1705373,131524408,11778395196, 1195433981028,135247561603456,16853285080609312, 2292048750536003426,337754031605269049112, 53608164572529006153454,9118712400086550140230888, 1655104918901340697851158384, 319341008921919836189242604080] |