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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 37 |
| 2 | 740 |
| 3 | 10545 |
| 4 | 119510 |
| 5 | 1142338 |
| 6 | 9548849 |
| 7 | 71529474 |
| 8 | 488650453 |
| 9 | 3084466705 |
| 10 | 18173253703 |
| 11 | 100751920597 |
| 12 | 529029597362 |
| 13 | 2645187324766 |
| 14 | 12651654794629 |
| 15 | 58105915432081 |
| 16 | 257102694583806 |
| 17 | 1099122519498352 |
| 18 | 4551159872375703 |
| 19 | 18293134887547452 |
[1,37,740,10545,119510,1142338,9548849,71529474, 488650453,3084466705,18173253703,100751920597, 529029597362,2645187324766,12651654794629, 58105915432081,257102694583806,1099122519498352, 4551159872375703,18293134887547452] |