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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 19 |
| 2 | 262 |
| 3 | 3196 |
| 4 | 36568 |
| 5 | 402544 |
| 6 | 4320352 |
| 7 | 45562816 |
| 8 | 474502528 |
| 9 | 4896020224 |
| 10 | 50168161792 |
| 11 | 511345294336 |
| 12 | 5190762354688 |
| 13 | 52526098837504 |
| 14 | 530208790700032 |
| 15 | 5341670325600256 |
| 16 | 53733362604802048 |
| 17 | 539866900838416384 |
| 18 | 5418935206707331072 |
| 19 | 54351481653658648576 |
| 20 | 544811853229269188608 |
[1,19,262,3196,36568,402544,4320352,45562816, 474502528,4896020224,50168161792,511345294336, 5190762354688,52526098837504,530208790700032, 5341670325600256,53733362604802048, 539866900838416384,5418935206707331072, 54351481653658648576,544811853229269188608] |