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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 45 |
| 3 | 1142 |
| 4 | 47253 |
| 5 | 2664573 |
| 6 | 187170069 |
| 7 | 15598588065 |
| 8 | 1497110942013 |
| 9 | 162226788530207 |
| 10 | 19566798092698042 |
| 11 | 2598785222401424468 |
| 12 | 376850999493886187699 |
| 13 | 59248452153964672923677 |
| 14 | 10039900576546291696149404 |
| 15 | 1824412367286993070795917580 |
| 16 | 353943959915575446954764374094 |
| 17 | 73024199735586268826145811783169 |
| 18 | 15966496692824534985042866376857576 |
| 19 | 3688160965656359052252569464435170928 |
| 20 | 897528733209823570848685886402050648933 |
[1,5,45,1142,47253,2664573,187170069,15598588065, 1497110942013,162226788530207,19566798092698042, 2598785222401424468,376850999493886187699, 59248452153964672923677, 10039900576546291696149404, 1824412367286993070795917580, 353943959915575446954764374094, 73024199735586268826145811783169, 15966496692824534985042866376857576, 3688160965656359052252569464435170928, 897528733209823570848685886402050648933] |