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| n | a(n) |
|---|---|
| 1 | 72 |
| 2 | 4106 |
| 3 | 258720 |
| 4 | 16041854 |
| 5 | 976810146 |
| 6 | 60277582112 |
| 7 | 3697656930974 |
| 8 | 227187542722224 |
| 9 | 13955749970865816 |
| 10 | 857261491476892738 |
| 11 | 52658393610889121840 |
| 12 | 3234721167229892503186 |
| 13 | 198698256597994229328826 |
[72,4106,258720,16041854,976810146,60277582112, 3697656930974,227187542722224,13955749970865816, 857261491476892738,52658393610889121840, 3234721167229892503186,198698256597994229328826] |