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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 93 |
| 4 | 1272 |
| 5 | 19058 |
| 6 | 302705 |
| 7 | 5007234 |
| 8 | 85341048 |
| 9 | 1488247757 |
| 10 | 26428516221 |
| 11 | 476280318599 |
| 12 | 8688447566960 |
| 13 | 160129594727162 |
| 14 | 2977120816382182 |
| 15 | 55769513231690143 |
| 16 | 1051605638580341912 |
| 17 | 19944384212454080598 |
| 18 | 380202253988763211734 |
| 19 | 7281079151205266545359 |
[1,1,8,93,1272,19058,302705,5007234,85341048, 1488247757,26428516221,476280318599,8688447566960, 160129594727162,2977120816382182, 55769513231690143,1051605638580341912, 19944384212454080598,380202253988763211734, 7281079151205266545359] |