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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 32 |
| 3 | 579 |
| 4 | 14736 |
| 5 | 483115 |
| 6 | 19376928 |
| 7 | 918980139 |
| 8 | 50306339072 |
| 9 | 3121729082739 |
| 10 | 216541483852800 |
| 11 | 16603614676249843 |
| 12 | 1394473165806440448 |
| 13 | 127308860552307549531 |
| 14 | 12553171419275174137856 |
| 15 | 1329537514269062031406875 |
| 16 | 150531055969843353812533248 |
| 17 | 18143286205523964035258551651 |
[1,3,32,579,14736,483115,19376928,918980139, 50306339072,3121729082739,216541483852800, 16603614676249843,1394473165806440448, 127308860552307549531,12553171419275174137856, 1329537514269062031406875, 150531055969843353812533248, 18143286205523964035258551651] |