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| n | a(n) |
|---|---|
| 1 | 1636 |
| 2 | 35877 |
| 3 | 358267 |
| 4 | 2593671 |
| 5 | 15836671 |
| 6 | 87269679 |
| 7 | 449795599 |
| 8 | 2213852367 |
| 9 | 10541202511 |
| 10 | 48969228111 |
| 11 | 223231118671 |
| 12 | 1002642454863 |
| 13 | 4450100228431 |
| 14 | 19559951884623 |
| 15 | 85281094811983 |
| 16 | 369296144564559 |
| 17 | 1589885770858831 |
| 18 | 6810377914286415 |
| 19 | 29044914697011535 |
| 20 | 123393405571563855 |
[1636,35877,358267,2593671,15836671,87269679, 449795599,2213852367,10541202511,48969228111, 223231118671,1002642454863,4450100228431, 19559951884623,85281094811983,369296144564559, 1589885770858831,6810377914286415, 29044914697011535,123393405571563855] |