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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 129 |
| 3 | 2317 |
| 4 | 26957 |
| 5 | 385147 |
| 6 | 5514889 |
| 7 | 70250881 |
| 8 | 866874825 |
| 9 | 10634404922 |
| 10 | 126906497939 |
| 11 | 1470673175003 |
| 12 | 16705788322140 |
| 13 | 186487470519166 |
| 14 | 2044203433733016 |
| 15 | 22025647881901542 |
| 16 | 233686866722213324 |
| 17 | 2443978994099801452 |
| 18 | 25211475391206919299 |
| 19 | 256716054713570158748 |
[1,1,129,2317,26957,385147,5514889,70250881, 866874825,10634404922,126906497939,1470673175003, 16705788322140,186487470519166,2044203433733016, 22025647881901542,233686866722213324, 2443978994099801452,25211475391206919299, 256716054713570158748] |