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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 26 |
| 3 | 76 |
| 4 | 776 |
| 5 | 3376 |
| 6 | 25376 |
| 7 | 131776 |
| 8 | 872576 |
| 9 | 4907776 |
| 10 | 30757376 |
| 11 | 179301376 |
| 12 | 1096779776 |
| 13 | 6496792576 |
| 14 | 39316299776 |
| 15 | 234555621376 |
| 16 | 1412702437376 |
| 17 | 8454739787776 |
| 18 | 50814338072576 |
| 19 | 304542431051776 |
| 20 | 1828628975845376 |
[1,1,26,76,776,3376,25376,131776,872576,4907776, 30757376,179301376,1096779776,6496792576, 39316299776,234555621376,1412702437376, 8454739787776,50814338072576,304542431051776, 1828628975845376] |