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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 57 |
| 3 | 410 |
| 4 | 4055 |
| 5 | 36877 |
| 6 | 310658 |
| 7 | 2817383 |
| 8 | 25115833 |
| 9 | 223137190 |
| 10 | 1986928549 |
| 11 | 17695730995 |
| 12 | 157551002096 |
| 13 | 1402893385536 |
| 14 | 12491465131399 |
| 15 | 111225018303022 |
| 16 | 990363617390993 |
| 17 | 8818318528316601 |
| 18 | 78519303830481116 |
| 19 | 699145265959550188 |
[5,57,410,4055,36877,310658,2817383,25115833, 223137190,1986928549,17695730995,157551002096, 1402893385536,12491465131399,111225018303022, 990363617390993,8818318528316601, 78519303830481116,699145265959550188] |