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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 80 |
| 4 | 703 |
| 5 | 6130 |
| 6 | 53351 |
| 7 | 466315 |
| 8 | 4118167 |
| 9 | 36941188 |
| 10 | 337853203 |
| 11 | 3155619199 |
| 12 | 30087573015 |
| 13 | 292226014968 |
| 14 | 2882482639376 |
| 15 | 28783571541579 |
| 16 | 290149337803965 |
| 17 | 2945978857054165 |
| 18 | 30080058358496842 |
| 19 | 308542728377796463 |
| 20 | 3177317808394936571 |
| 21 | 32835881264222087409 |
| 22 | 340467815173685043729 |
[1,9,80,703,6130,53351,466315,4118167,36941188, 337853203,3155619199,30087573015,292226014968, 2882482639376,28783571541579,290149337803965, 2945978857054165,30080058358496842, 308542728377796463,3177317808394936571, 32835881264222087409,340467815173685043729] |