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| n | a(n) |
|---|---|
| 3 | 3 |
| 4 | 33 |
| 5 | 388 |
| 6 | 5101 |
| 7 | 75444 |
| 8 | 1248911 |
| 9 | 22964112 |
| 10 | 465344235 |
| 11 | 10316541393 |
| 12 | 248583207948 |
| 13 | 6472094085480 |
| 14 | 181133509590584 |
| 15 | 5424172954377851 |
| 16 | 173089061380034193 |
| 17 | 5864328868997378224 |
| 18 | 210259284591708083349 |
| 19 | 7954221480382049449284 |
| 20 | 316654854011156144727459 |
| 21 | 13233287747652092826502116 |
[3,33,388,5101,75444,1248911,22964112,465344235, 10316541393,248583207948,6472094085480, 181133509590584,5424172954377851, 173089061380034193,5864328868997378224, 210259284591708083349,7954221480382049449284, 316654854011156144727459, 13233287747652092826502116] |