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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 38 |
| 5 | 471 |
| 6 | 10661 |
| 7 | 450923 |
| 8 | 35863932 |
| 9 | 5353011030 |
| 10 | 1500957421749 |
| 11 | 790347882174803 |
| 12 | 781621363452395224 |
| 13 | 1451740730942350766747 |
| 14 | 5064070747064013555843107 |
| 15 | 33176273260130056822126522407 |
[1,1,5,38,471,10661,450923,35863932,5353011030, 1500957421749,790347882174803,781621363452395224, 1451740730942350766747,5064070747064013555843107, 33176273260130056822126522407] |