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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 30 |
| 2 | 1023 |
| 3 | 44473 |
| 4 | 2475473 |
| 5 | 173721912 |
| 6 | 15088541896 |
| 7 | 1593719752240 |
| 8 | 201529405816816 |
| 9 | 30092049283982400 |
| 10 | 5242380158902146624 |
| 11 | 1054368810603158319360 |
| 12 | 242558905724502235934976 |
| 13 | 63305390270900389045395456 |
| 14 | 18607799824329123330114576384 |
[1,30,1023,44473,2475473,173721912,15088541896, 1593719752240,201529405816816,30092049283982400, 5242380158902146624,1054368810603158319360, 242558905724502235934976, 63305390270900389045395456, 18607799824329123330114576384] |