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A155636 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 105 |
| 3 | 853 |
| 4 | 7185 |
| 5 | 62173 |
| 6 | 547065 |
| 7 | 4861093 |
| 8 | 43437345 |
| 9 | 389373613 |
| 10 | 3496550025 |
| 11 | 31429887733 |
| 12 | 282673677105 |
| 13 | 2543086531453 |
| 14 | 22882895970585 |
| 15 | 205921649672773 |
| 16 | 1853172776742465 |
| 17 | 16677944639119693 |
| 18 | 150098449994264745 |
| 19 | 1350870791159320213 |
| 20 | 12157760826488569425 |
| 21 | 109419465968670562333 |
[1,13,105,853,7185,62173,547065,4861093,43437345, 389373613,3496550025,31429887733,282673677105, 2543086531453,22882895970585,205921649672773, 1853172776742465,16677944639119693, 150098449994264745,1350870791159320213, 12157760826488569425,109419465968670562333] |