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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 105 |
| 3 | 5600 |
| 4 | 27195 |
| 5 | 33860 |
| 6 | 42925 |
| 7 | 1275170 |
| 8 | 1657225 |
| 9 | 6018495 |
| 10 | 45962330 |
| 11 | 47681900 |
| 12 | 56319925 |
| 13 | 60331825 |
| 14 | 277695950 |
| 15 | 348285175 |
| 16 | 1305060855 |
| 17 | 2151904825 |
| 18 | 2175976225 |
| 19 | 10363227560 |
| 20 | 12973622725 |
| 21 | 59994427550 |
| 22 | 60063064790 |
| 23 | 73115587525 |
[0,105,5600,27195,33860,42925,1275170,1657225, 6018495,45962330,47681900,56319925,60331825, 277695950,348285175,1305060855,2151904825, 2175976225,10363227560,12973622725,59994427550, 60063064790,73115587525] |