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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 12 |
| 3 | 38 |
| 4 | 192 |
| 5 | 1558 |
| 6 | 18940 |
| 7 | 364970 |
| 8 | 10283548 |
| 9 | 429504540 |
| 10 | 25437005278 |
| 11 | 2101856931492 |
| 12 | 235596818865156 |
| 13 | 35497898136868548 |
| 14 | 7006717056754996580 |
| 15 | 1795137645392400993718 |
| 16 | 583598433809166736549828 |
[6,12,38,192,1558,18940,364970,10283548,429504540, 25437005278,2101856931492,235596818865156, 35497898136868548,7006717056754996580, 1795137645392400993718,583598433809166736549828] |