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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 19 |
| 3 | 356 |
| 4 | 13626 |
| 5 | 712482 |
| 6 | 51437310 |
| 7 | 5021800835 |
| 8 | 618616762763 |
| 9 | 95445366568311 |
| 10 | 18045402520903033 |
| 11 | 4089264784742659744 |
| 12 | 1098689143687870325930 |
| 13 | 345713999063910185516303 |
| 14 | 125935810020098258689919235 |
| 15 | 52660666992259419412862687142 |
[1,1,19,356,13626,712482,51437310,5021800835, 618616762763,95445366568311,18045402520903033, 4089264784742659744,1098689143687870325930, 345713999063910185516303, 125935810020098258689919235, 52660666992259419412862687142] |