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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 38 |
| 4 | 373 |
| 5 | 4461 |
| 6 | 68033 |
| 7 | 1202753 |
| 8 | 24757484 |
| 9 | 574608039 |
| 10 | 14925278329 |
| 11 | 427729375161 |
| 12 | 13424413453317 |
| 13 | 457608305315211 |
| 14 | 16841852554413561 |
| 15 | 665483754539870667 |
| 16 | 28101844918556128030 |
| 17 | 1262901795439193700478 |
| 18 | 60182608193322255156347 |
| 19 | 3031285556584399354961535 |
[1,6,38,373,4461,68033,1202753,24757484,574608039, 14925278329,427729375161,13424413453317, 457608305315211,16841852554413561, 665483754539870667,28101844918556128030, 1262901795439193700478,60182608193322255156347, 3031285556584399354961535] |