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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 127 |
| 3 | 1684 |
| 4 | 22717 |
| 5 | 309214 |
| 6 | 4231675 |
| 7 | 58117672 |
| 8 | 800173945 |
| 9 | 11037041074 |
| 10 | 152448280183 |
| 11 | 2107959984316 |
| 12 | 29172777600565 |
| 13 | 404016491894662 |
| 14 | 5598523988234227 |
| 15 | 77617624970307664 |
| 16 | 1076533162210721521 |
| 17 | 14936507761662251866 |
| 18 | 207302489038473478255 |
| 19 | 2877906561872502533860 |
[1,10,127,1684,22717,309214,4231675,58117672, 800173945,11037041074,152448280183,2107959984316, 29172777600565,404016491894662,5598523988234227, 77617624970307664,1076533162210721521, 14936507761662251866,207302489038473478255, 2877906561872502533860] |