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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 8 |
| 3 | 108 |
| 4 | 480 |
| 5 | 1400 |
| 6 | 3240 |
| 7 | 6468 |
| 8 | 11648 |
| 9 | 19440 |
| 10 | 30600 |
| 11 | 45980 |
| 12 | 66528 |
| 13 | 93288 |
| 14 | 127400 |
| 15 | 170100 |
| 16 | 222720 |
| 17 | 286688 |
| 18 | 363528 |
| 19 | 454860 |
| 20 | 562400 |
| 21 | 687960 |
| 22 | 833448 |
| 23 | 1000868 |
| 24 | 1192320 |
| 25 | 1410000 |
| 26 | 1656200 |
| 27 | 1933308 |
| 28 | 2243808 |
| 29 | 2590280 |
| 30 | 2975400 |
[0,8,108,480,1400,3240,6468,11648,19440,30600, 45980,66528,93288,127400,170100,222720,286688, 363528,454860,562400,687960,833448,1000868, 1192320,1410000,1656200,1933308,2243808,2590280, 2975400] |