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A258175 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 12 |
| 3 | 114 |
| 4 | 1448 |
| 5 | 22770 |
| 6 | 424164 |
| 7 | 9095450 |
| 8 | 220023184 |
| 9 | 5914998594 |
| 10 | 174682531260 |
| 11 | 5614908340866 |
| 12 | 194967208057272 |
| 13 | 7267467723747218 |
| 14 | 289270983756577620 |
| 15 | 12239218862861690250 |
| 16 | 548301077168477951520 |
| 17 | 25918121712918957399426 |
| 18 | 1288797080051656060595820 |
[1,2,12,114,1448,22770,424164,9095450,220023184, 5914998594,174682531260,5614908340866, 194967208057272,7267467723747218, 289270983756577620,12239218862861690250, 548301077168477951520,25918121712918957399426, 1288797080051656060595820] |