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A170598 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 156 |
| 3 | 1872 |
| 4 | 22464 |
| 5 | 269568 |
| 6 | 3234816 |
| 7 | 38817792 |
| 8 | 465813504 |
| 9 | 5589762048 |
| 10 | 67077144576 |
| 11 | 804925734912 |
| 12 | 9659108818944 |
| 13 | 115909305827328 |
| 14 | 1390911669927936 |
| 15 | 16690940039135232 |
| 16 | 200291280469622784 |
[1,13,156,1872,22464,269568,3234816,38817792, 465813504,5589762048,67077144576,804925734912, 9659108818944,115909305827328,1390911669927936, 16690940039135232,200291280469622784] |