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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 240 |
| 3 | 117 |
| 4 | 4326 |
| 5 | 58139 |
| 6 | 551191 |
| 7 | 12345692 |
| 8 | 187346100 |
| 9 | 2776620332 |
| 10 | 51224230251 |
| 11 | 877976797015 |
| 12 | 14037996315050 |
| 13 | 248132516330900 |
| 14 | 4292021929521862 |
| 15 | 71306813593798603 |
| 16 | 1236450781326731121 |
| 17 | 21325562132530541113 |
[0,240,117,4326,58139,551191,12345692,187346100, 2776620332,51224230251,877976797015, 14037996315050,248132516330900,4292021929521862, 71306813593798603,1236450781326731121, 21325562132530541113] |