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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 38 |
| 2 | 1106 |
| 3 | 26544 |
| 4 | 567203 |
| 5 | 11179686 |
| 6 | 207768576 |
| 7 | 3692419776 |
| 8 | 63361188037 |
| 9 | 1057109514902 |
| 10 | 17235551954894 |
| 11 | 275697361933728 |
| 12 | 4339725043253447 |
| 13 | 67384965236252310 |
| 14 | 1034147721558836220 |
| 15 | 15711425790758327952 |
| 16 | 236612932874975360809 |
| 17 | 3536182524466029241958 |
| 18 | 52494462902614684280330 |
[1,38,1106,26544,567203,11179686,207768576, 3692419776,63361188037,1057109514902, 17235551954894,275697361933728,4339725043253447, 67384965236252310,1034147721558836220, 15711425790758327952,236612932874975360809, 3536182524466029241958,52494462902614684280330] |